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40020220 = 2259472113
BaseRepresentation
bin1001100010101…
…0100011111100
32210022020102101
42120222203330
540221121340
63545434444
7664111012
oct230524374
983266371
1040020220
1120654869
121149ba24
1383a2b06
14545a8b2
1537a7c9a
hex262a8fc

40020220 has 24 divisors (see below), whose sum is σ = 84171024. Its totient is φ = 15983616.

The previous prime is 40020191. The next prime is 40020221. The reversal of 40020220 is 2202004.

It is a happy number.

40020220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 40020197 and 40020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17884 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (3507126).

Almost surely, 240020220 is an apocalyptic number.

It is an amenable number.

40020220 is an abundant number, since it is smaller than the sum of its proper divisors (44150804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40020220 is a wasteful number, since it uses less digits than its factorization.

40020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069 (or 3067 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 40020220 is about 6326.1536497306. The cubic root of 40020220 is about 342.0528058175.

Adding to 40020220 its reverse (2202004), we get a palindrome (42222224).

The spelling of 40020220 in words is "forty million, twenty thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 947 1894 2113 3788 4226 4735 8452 9470 10565 18940 21130 42260 2001011 4002022 8004044 10005055 20010110 40020220