39930457840 has 80 divisors (see below), whose sum is σ = 114262561728. Its totient is φ = 12637329408.

The previous prime is 39930457793. The next prime is 39930457867. The reversal of 39930457840 is 4875403993.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2735197 + ... + 2749756.

Almost surely, 2^39930457840 is an apocalyptic number.

It is an amenable number.

39930457840 is an abundant number, since it is smaller than the sum of its proper divisors (74332103888).

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

39930457840 is a wasteful number, since it uses less digits than its factorization.

39930457840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484986 (or 5484980 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 39930457840 in words is "thirty-nine billion, nine hundred thirty million, four hundred fifty-seven thousand, eight hundred forty".