390385277 has 4 divisors (see below), whose sum is σ = 391069536. Its totient is φ = 389701020.

The previous prime is 390385273. The next prime is 390385319. The reversal of 390385277 is 772583093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 772583093 = 1097 ⋅704269.

It is a cyclic number.

It is not a de Polignac number, because 390385277 - 2² = 390385273 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390385273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341273 + ... + 342414.

It is an arithmetic number, because the mean of its divisors is an integer number (97767384).

Almost surely, 2^390385277 is an apocalyptic number.

It is an amenable number.

390385277 is a deficient number, since it is larger than the sum of its proper divisors (684259).

390385277 is an equidigital number, since it uses as much as digits as its factorization.

390385277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684258.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 390385277 is about 19758.1698798244. The cubic root of 390385277 is about 730.8548670347.

The spelling of 390385277 in words is "three hundred ninety million, three hundred eighty-five thousand, two hundred seventy-seven".