39906390880 has 24 divisors (see below), whose sum is σ = 94278848832. Its totient is φ = 15962556288.

The previous prime is 39906390871. The next prime is 39906390883. The reversal of 39906390880 is 8809360993.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39906390883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124707312 + ... + 124707631.

It is an arithmetic number, because the mean of its divisors is an integer number (3928285368).

Almost surely, 2^39906390880 is an apocalyptic number.

It is an amenable number.

39906390880 is an abundant number, since it is smaller than the sum of its proper divisors (54372457952).

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

39906390880 is a wasteful number, since it uses less digits than its factorization.

39906390880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249414958 (or 249414950 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 39906390880 in words is "thirty-nine billion, nine hundred six million, three hundred ninety thousand, eight hundred eighty".