40335220 has 24 divisors (see below), whose sum is σ = 89687304. Its totient is φ = 15184896.

The previous prime is 40335209. The next prime is 40335223. The reversal of 40335220 is 2253304.

It can be written as a sum of positive squares in 4 ways, for example, as 13003236 + 27331984 = 3606^2 + 5228^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40335223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58977 + ... + 59656.

It is an arithmetic number, because the mean of its divisors is an integer number (3736971).

Almost surely, 2^40335220 is an apocalyptic number.

It is an amenable number.

40335220 is an abundant number, since it is smaller than the sum of its proper divisors (49352084).

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

40335220 is a wasteful number, since it uses less digits than its factorization.

40335220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118659 (or 118657 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 40335220 is about 6351.0014958273. The cubic root of 40335220 is about 342.9478964452.

Subtracting from 40335220 its sum of digits (19), we obtain a square (40335201 = 6351²).

Adding to 40335220 its reverse (2253304), we get a palindrome (42588524).

The spelling of 40335220 in words is "forty million, three hundred thirty-five thousand, two hundred twenty".