387638790 has 64 divisors (see below), whose sum is σ = 1159902720. Its totient is φ = 80547840.

The previous prime is 387638773. The next prime is 387638807. The reversal of 387638790 is 97836783.

It is an interprime number because it is at equal distance from previous prime (387638773) and next prime (387638807).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81595 + ... + 86214.

It is an arithmetic number, because the mean of its divisors is an integer number (18123480).

Almost surely, 2^387638790 is an apocalyptic number.

387638790 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

387638790 is an abundant number, since it is smaller than the sum of its proper divisors (772263930).

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

387638790 is a wasteful number, since it uses less digits than its factorization.

387638790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167837.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 387638790 is about 19688.5446389519. The cubic root of 387638790 is about 729.1368982387.

The spelling of 387638790 in words is "three hundred eighty-seven million, six hundred thirty-eight thousand, seven hundred ninety".