40138932 has 24 divisors (see below), whose sum is σ = 96189856. Its totient is φ = 13017888.

The previous prime is 40138919. The next prime is 40138937. The reversal of 40138932 is 23983104.

It is a super-2 number, since 2×40138932² = 3222267724201248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40138932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40138937) 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, 44758 + ... + 45645.

Almost surely, 2^40138932 is an apocalyptic number.

It is an amenable number.

40138932 is an abundant number, since it is smaller than the sum of its proper divisors (56050924).

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

40138932 is a wasteful number, since it uses less digits than its factorization.

40138932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90447 (or 90445 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 40138932 is about 6335.5293385794. The cubic root of 40138932 is about 342.3906824298.

The spelling of 40138932 in words is "forty million, one hundred thirty-eight thousand, nine hundred thirty-two".