385390915 has 64 divisors (see below), whose sum is σ = 596090880. Its totient is φ = 232657920.

The previous prime is 385390909. The next prime is 385390919. The reversal of 385390915 is 519093583.

It is not a de Polignac number, because 385390915 - 2⁷ = 385390787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385390919) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1255192 + ... + 1255498.

It is an arithmetic number, because the mean of its divisors is an integer number (9313920).

Almost surely, 2^385390915 is an apocalyptic number.

385390915 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

385390915 is a deficient number, since it is larger than the sum of its proper divisors (210699965).

385390915 is a wasteful number, since it uses less digits than its factorization.

385390915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 385390915 is about 19631.3757796034. The cubic root of 385390915 is about 727.7247700431.

The spelling of 385390915 in words is "three hundred eighty-five million, three hundred ninety thousand, nine hundred fifteen".