390736986 has 8 divisors (see below), whose sum is σ = 781473984. Its totient is φ = 130245660.

The previous prime is 390736933. The next prime is 390737003. The reversal of 390736986 is 689637093.

It is a happy number.

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

390736986 is an admirable 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, 32561410 + ... + 32561421.

It is an arithmetic number, because the mean of its divisors is an integer number (97684248).

Almost surely, 2^390736986 is an apocalyptic number.

390736986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

390736986 is a wasteful number, since it uses less digits than its factorization.

390736986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65122836.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 390736986 is about 19767.0682196425. The cubic root of 390736986 is about 731.0742836762.

The spelling of 390736986 in words is "three hundred ninety million, seven hundred thirty-six thousand, nine hundred eighty-six".