390745347880 has 16 divisors (see below), whose sum is σ = 879177032820. Its totient is φ = 156298139136.

The previous prime is 390745347857. The next prime is 390745347911. The reversal of 390745347880 is 88743547093.

It can be written as a sum of positive squares in 2 ways, for example, as 384025611204 + 6719736676 = 619698^2 + 81974^2 .

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, 4884316809 + ... + 4884316888.

Almost surely, 2^390745347880 is an apocalyptic number.

It is an amenable number.

390745347880 is an abundant number, since it is smaller than the sum of its proper divisors (488431684940).

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

390745347880 is a wasteful number, since it uses less digits than its factorization.

390745347880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9768633708 (or 9768633704 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 390745347880 in words is "three hundred ninety billion, seven hundred forty-five million, three hundred forty-seven thousand, eight hundred eighty".