390887788 has 12 divisors (see below), whose sum is σ = 685779472. Its totient is φ = 194950800.

The previous prime is 390887747. The next prime is 390887797. The reversal of 390887788 is 887788093.

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, 121488 + ... + 124663.

Almost surely, 2^390887788 is an apocalyptic number.

It is an amenable number.

390887788 is a deficient number, since it is larger than the sum of its proper divisors (294891684).

390887788 is a wasteful number, since it uses less digits than its factorization.

390887788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246552 (or 246550 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 58.

The square root of 390887788 is about 19770.8823273014. The cubic root of 390887788 is about 731.1683224525.

The spelling of 390887788 in words is "three hundred ninety million, eight hundred eighty-seven thousand, seven hundred eighty-eight".