390561880 has 32 divisors (see below), whose sum is σ = 879938640. Its totient is φ = 156016000.

The previous prime is 390561863. The next prime is 390561881. The reversal of 390561880 is 88165093.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390561881) 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, 25755 + ... + 38005.

Almost surely, 2^390561880 is an apocalyptic number.

It is an amenable number.

390561880 is an abundant number, since it is smaller than the sum of its proper divisors (489376760).

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

390561880 is a wasteful number, since it uses less digits than its factorization.

390561880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13059 (or 13055 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 390561880 is about 19762.6384878133. The cubic root of 390561880 is about 730.9650587790.

The spelling of 390561880 in words is "three hundred ninety million, five hundred sixty-one thousand, eight hundred eighty".