387865428 has 48 divisors (see below), whose sum is σ = 938079744. Its totient is φ = 124600320.

The previous prime is 387865417. The next prime is 387865433. The reversal of 387865428 is 824568783.

It is a happy number.

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, 93576 + ... + 97632.

It is an arithmetic number, because the mean of its divisors is an integer number (19543328).

Almost surely, 2^387865428 is an apocalyptic number.

It is an amenable number.

387865428 is an abundant number, since it is smaller than the sum of its proper divisors (550214316).

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

387865428 is a wasteful number, since it uses less digits than its factorization.

387865428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352 (or 4350 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 51.

The square root of 387865428 is about 19694.2993782465. The cubic root of 387865428 is about 729.2789703067.

The spelling of 387865428 in words is "three hundred eighty-seven million, eight hundred sixty-five thousand, four hundred twenty-eight".