385821915 has 8 divisors (see below), whose sum is σ = 617315088. Its totient is φ = 205771680.

The previous prime is 385821907. The next prime is 385821949. The reversal of 385821915 is 519128583.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 385821915 - 2³ = 385821907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12860716 + ... + 12860745.

It is an arithmetic number, because the mean of its divisors is an integer number (77164386).

Almost surely, 2^385821915 is an apocalyptic number.

385821915 is a deficient number, since it is larger than the sum of its proper divisors (231493173).

385821915 is a wasteful number, since it uses less digits than its factorization.

385821915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25721469.

The product of its digits is 86400, while the sum is 42.

The square root of 385821915 is about 19642.3500376101. The cubic root of 385821915 is about 727.9959514276.

The spelling of 385821915 in words is "three hundred eighty-five million, eight hundred twenty-one thousand, nine hundred fifteen".