40112020 has 24 divisors (see below), whose sum is σ = 90715464. Its totient is φ = 14810496.

The previous prime is 40112003. The next prime is 40112081. The reversal of 40112020 is 2021104.

It can be written as a sum of positive squares in 4 ways, for example, as 1993744 + 38118276 = 1412^2 + 6174^2 .

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 = 40111988 and 40112006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76879 + ... + 77398.

It is an arithmetic number, because the mean of its divisors is an integer number (3779811).

Almost surely, 2^40112020 is an apocalyptic number.

It is an amenable number.

40112020 is an abundant number, since it is smaller than the sum of its proper divisors (50603444).

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

40112020 is a wasteful number, since it uses less digits than its factorization.

40112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154299 (or 154297 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 40112020 is about 6333.4050873128. The cubic root of 40112020 is about 342.3141442852.

Adding to 40112020 its reverse (2021104), we get a palindrome (42133124).

It can be divided in two parts, 401 and 12020, that added together give a palindrome (12421).

The spelling of 40112020 in words is "forty million, one hundred twelve thousand, twenty".