386787128 has 64 divisors (see below), whose sum is σ = 945120960. Its totient is φ = 144009216.

The previous prime is 386787109. The next prime is 386787139. The reversal of 386787128 is 821787683.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3251 + ... + 28002.

It is an arithmetic number, because the mean of its divisors is an integer number (14767515).

Almost surely, 2^386787128 is an apocalyptic number.

It is an amenable number.

386787128 is an abundant number, since it is smaller than the sum of its proper divisors (558333832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

386787128 is a wasteful number, since it uses less digits than its factorization.

386787128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31296 (or 31292 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 386787128 is about 19666.9043827441. The cubic root of 386787128 is about 728.6025231671.

The spelling of 386787128 in words is "three hundred eighty-six million, seven hundred eighty-seven thousand, one hundred twenty-eight".