40000000032 has 72 divisors (see below), whose sum is σ = 114813172656. Its totient is φ = 13208712576.

The previous prime is 40000000031. The next prime is 40000000069. The reversal of 40000000032 is 23000000004.

It is a tau number, because it is divible by the number of its divisors (72).

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 = 39999999951 and 40000000023.

It is not an unprimeable number, because it can be changed into a prime (40000000031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 618198 + ... + 679829.

It is an arithmetic number, because the mean of its divisors is an integer number (1594627398).

Almost surely, 2^40000000032 is an apocalyptic number.

It is an amenable number.

40000000032 is an abundant number, since it is smaller than the sum of its proper divisors (74813172624).

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

40000000032 is a wasteful number, since it uses less digits than its factorization.

40000000032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298150 (or 1298139 counting only the distinct ones).

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

Adding to 40000000032 its reverse (23000000004), we get a palindrome (63000000036).

The spelling of 40000000032 in words is "forty billion, thirty-two", and thus it is an aban number, an eban number, and an uban number.