387239685 has 64 divisors (see below), whose sum is σ = 753007104. Its totient is φ = 165888000.

The previous prime is 387239663. The next prime is 387239717. The reversal of 387239685 is 586932783.

It is not a de Polignac number, because 387239685 - 2⁵ = 387239653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 715515 + ... + 716055.

It is an arithmetic number, because the mean of its divisors is an integer number (11765736).

Almost surely, 2^387239685 is an apocalyptic number.

387239685 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

387239685 is a deficient number, since it is larger than the sum of its proper divisors (365767419).

387239685 is a wasteful number, since it uses less digits than its factorization.

387239685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974.

The product of its digits is 2177280, while the sum is 51.

The square root of 387239685 is about 19678.4065665897. The cubic root of 387239685 is about 728.8865774792.

The spelling of 387239685 in words is "three hundred eighty-seven million, two hundred thirty-nine thousand, six hundred eighty-five".