390544191640 has 32 divisors (see below), whose sum is σ = 879389746560. Its totient is φ = 156099398400.

The previous prime is 390544191619. The next prime is 390544191641. The reversal of 390544191640 is 46191445093.

It is a Smith number, since the sum of its digits (46) 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 (390544191641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3642696 + ... + 3748375.

It is an arithmetic number, because the mean of its divisors is an integer number (27480929580).

Almost surely, 2^390544191640 is an apocalyptic number.

It is an amenable number.

390544191640 is an abundant number, since it is smaller than the sum of its proper divisors (488845554920).

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

390544191640 is a wasteful number, since it uses less digits than its factorization.

390544191640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7392403 (or 7392399 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 390544191640 in words is "three hundred ninety billion, five hundred forty-four million, one hundred ninety-one thousand, six hundred forty".