40000032 has 36 divisors (see below), whose sum is σ = 113750910. Its totient is φ = 13333248.

The previous prime is 40000021. The next prime is 40000033. The reversal of 40000032 is 23000004.

It can be written as a sum of positive squares in only one way, i.e., 39992976 + 7056 = 6324^2 + 84^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 39999969 and 40000023.

It is not an unprimeable number, because it can be changed into a prime (40000033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69157 + ... + 69732.

Almost surely, 2^40000032 is an apocalyptic number.

It is an amenable number.

40000032 is an abundant number, since it is smaller than the sum of its proper divisors (73750878).

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

40000032 is a wasteful number, since it uses less digits than its factorization.

40000032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138905 (or 138894 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 40000032 is about 6324.5578501584. The cubic root of 40000032 is about 341.9952805340.

Adding to 40000032 its reverse (23000004), we get a palindrome (63000036).

The spelling of 40000032 in words is "forty million, thirty-two", and thus it is an aban number, an eban number, and an uban number.