39700040 has 32 divisors (see below), whose sum is σ = 89857080. Its totient is φ = 15785472.

The previous prime is 39700027. The next prime is 39700061. The reversal of 39700040 is 4000793.

It can be written as a sum of positive squares in 4 ways, for example, as 28153636 + 11546404 = 5306^2 + 3398^2 .

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 39699979 and 39700015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4052 + ... + 9788.

Almost surely, 2^39700040 is an apocalyptic number.

It is an amenable number.

39700040 is an abundant number, since it is smaller than the sum of its proper divisors (50157040).

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

39700040 is a wasteful number, since it uses less digits than its factorization.

39700040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921 (or 5917 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 39700040 is about 6300.7967750119. The cubic root of 39700040 is about 341.1381695131.

The spelling of 39700040 in words is "thirty-nine million, seven hundred thousand, forty".