390986915 has 8 divisors (see below), whose sum is σ = 511837488. Its totient is φ = 284354080.

The previous prime is 390986909. The next prime is 390986951. The reversal of 390986915 is 519689093.

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

It is not a de Polignac number, because 390986915 - 2¹⁰ = 390985891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3554372 + ... + 3554481.

It is an arithmetic number, because the mean of its divisors is an integer number (63979686).

Almost surely, 2^390986915 is an apocalyptic number.

390986915 is a deficient number, since it is larger than the sum of its proper divisors (120850573).

390986915 is a wasteful number, since it uses less digits than its factorization.

390986915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108869.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 390986915 is about 19773.3890620703. The cubic root of 390986915 is about 731.2301239880.

The spelling of 390986915 in words is "three hundred ninety million, nine hundred eighty-six thousand, nine hundred fifteen".