385306887 has 16 divisors (see below), whose sum is σ = 621672192. Its totient is φ = 207223680.

The previous prime is 385306877. The next prime is 385306891. The reversal of 385306887 is 788603583.

It is a happy number.

It is not a de Polignac number, because 385306887 - 2⁸ = 385306631 is a prime.

It is a super-2 number, since 2×385306887² = 296922794339261538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385306877) 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, 539289 + ... + 540002.

It is an arithmetic number, because the mean of its divisors is an integer number (38854512).

Almost surely, 2^385306887 is an apocalyptic number.

385306887 is a deficient number, since it is larger than the sum of its proper divisors (236365305).

385306887 is a wasteful number, since it uses less digits than its factorization.

385306887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079318.

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 385306887 is about 19629.2355174622. The cubic root of 385306887 is about 727.6718768210.

The spelling of 385306887 in words is "three hundred eighty-five million, three hundred six thousand, eight hundred eighty-seven".