40438365 has 32 divisors (see below), whose sum is σ = 74304000. Its totient is φ = 18573120.

The previous prime is 40438357. The next prime is 40438367. The reversal of 40438365 is 56383404.

It is not a de Polignac number, because 40438365 - 2³ = 40438357 is a prime.

It is a super-2 number, since 2×40438365² = 3270522727746450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40438367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3315 + ... + 9584.

It is an arithmetic number, because the mean of its divisors is an integer number (2322000).

Almost surely, 2^40438365 is an apocalyptic number.

It is an amenable number.

40438365 is a deficient number, since it is larger than the sum of its proper divisors (33865635).

40438365 is a wasteful number, since it uses less digits than its factorization.

40438365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12937.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 40438365 is about 6359.1166839428. The cubic root of 40438365 is about 343.2399757690.

The spelling of 40438365 in words is "forty million, four hundred thirty-eight thousand, three hundred sixty-five".