390584987 has 16 divisors (see below), whose sum is σ = 438121152. Its totient is φ = 345824640.

The previous prime is 390584977. The next prime is 390585023. The reversal of 390584987 is 789485093.

It is a cyclic number.

It is not a de Polignac number, because 390584987 - 2⁶ = 390584923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390584917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28433 + ... + 39869.

It is an arithmetic number, because the mean of its divisors is an integer number (27382572).

Almost surely, 2^390584987 is an apocalyptic number.

390584987 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

390584987 is a deficient number, since it is larger than the sum of its proper divisors (47536165).

390584987 is a wasteful number, since it uses less digits than its factorization.

390584987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11558.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 390584987 is about 19763.2230924007. The cubic root of 390584987 is about 730.9794739736.

The spelling of 390584987 in words is "three hundred ninety million, five hundred eighty-four thousand, nine hundred eighty-seven".