390856479 has 32 divisors (see below), whose sum is σ = 569769984. Its totient is φ = 236901120.

The previous prime is 390856441. The next prime is 390856483. The reversal of 390856479 is 974658093.

It is not a de Polignac number, because 390856479 - 2⁸ = 390856223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390856409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1020322 + ... + 1020704.

It is an arithmetic number, because the mean of its divisors is an integer number (17805312).

Almost surely, 2^390856479 is an apocalyptic number.

390856479 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

390856479 is a deficient number, since it is larger than the sum of its proper divisors (178913505).

390856479 is a wasteful number, since it uses less digits than its factorization.

390856479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 390856479 is about 19770.0905157260. The cubic root of 390856479 is about 731.1488004303.

The spelling of 390856479 in words is "three hundred ninety million, eight hundred fifty-six thousand, four hundred seventy-nine".