390788387 has 16 divisors (see below), whose sum is σ = 447304704. Its totient is φ = 338148000.

The previous prime is 390788383. The next prime is 390788389. The reversal of 390788387 is 783887093.

It is not a de Polignac number, because 390788387 - 2² = 390788383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390788383) 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, 11408 + ... + 30194.

It is an arithmetic number, because the mean of its divisors is an integer number (27956544).

Almost surely, 2^390788387 is an apocalyptic number.

390788387 is a deficient number, since it is larger than the sum of its proper divisors (56516317).

390788387 is a wasteful number, since it uses less digits than its factorization.

390788387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18890.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The square root of 390788387 is about 19768.3683444031. The cubic root of 390788387 is about 731.1063395970.

The spelling of 390788387 in words is "three hundred ninety million, seven hundred eighty-eight thousand, three hundred eighty-seven".