387621871 has 16 divisors (see below), whose sum is σ = 478374400. Its totient is φ = 305853408.

The previous prime is 387621851. The next prime is 387621881. The reversal of 387621871 is 178126783.

It is not a de Polignac number, because 387621871 - 2⁹ = 387621359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387621821) 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, 28870 + ... + 40108.

It is an arithmetic number, because the mean of its divisors is an integer number (29898400).

Almost surely, 2^387621871 is an apocalyptic number.

387621871 is a deficient number, since it is larger than the sum of its proper divisors (90752529).

387621871 is a wasteful number, since it uses less digits than its factorization.

387621871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11638.

The product of its digits is 112896, while the sum is 43.

The square root of 387621871 is about 19688.1149681731. The cubic root of 387621871 is about 729.1262900411.

The spelling of 387621871 in words is "three hundred eighty-seven million, six hundred twenty-one thousand, eight hundred seventy-one".