39907397990 has 8 divisors (see below), whose sum is σ = 71833316400. Its totient is φ = 15962959192.

The previous prime is 39907397947. The next prime is 39907398029. The reversal of 39907397990 is 9979370993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995369890 + ... + 1995369909.

It is an arithmetic number, because the mean of its divisors is an integer number (8979164550).

Almost surely, 2^39907397990 is an apocalyptic number.

39907397990 is a deficient number, since it is larger than the sum of its proper divisors (31925918410).

39907397990 is a wasteful number, since it uses less digits than its factorization.

39907397990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990739806.

The product of its (nonzero) digits is 26040609, while the sum is 65.

The spelling of 39907397990 in words is "thirty-nine billion, nine hundred seven million, three hundred ninety-seven thousand, nine hundred ninety".