387791390 has 24 divisors (see below), whose sum is σ = 811988712. Its totient is φ = 132956880.

The previous prime is 387791381. The next prime is 387791399. The reversal of 387791390 is 93197783.

It is an interprime number because it is at equal distance from previous prime (387791381) and next prime (387791399).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387791399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395216 + ... + 396195.

It is an arithmetic number, because the mean of its divisors is an integer number (33832863).

Almost surely, 2^387791390 is an apocalyptic number.

387791390 is an abundant number, since it is smaller than the sum of its proper divisors (424197322).

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

387791390 is a wasteful number, since it uses less digits than its factorization.

387791390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791432 (or 791425 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 387791390 is about 19692.4196075546. The cubic root of 387791390 is about 729.2325643555.

The spelling of 387791390 in words is "three hundred eighty-seven million, seven hundred ninety-one thousand, three hundred ninety".