387157920 has 48 divisors (see below), whose sum is σ = 1219548960. Its totient is φ = 103241984.

The previous prime is 387157913. The next prime is 387157931. The reversal of 387157920 is 29751783.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402810 + ... + 403769.

It is an arithmetic number, because the mean of its divisors is an integer number (25407270).

Almost surely, 2^387157920 is an apocalyptic number.

387157920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

387157920 is an abundant number, since it is smaller than the sum of its proper divisors (832391040).

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

387157920 is a wasteful number, since it uses less digits than its factorization.

387157920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806597 (or 806589 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 387157920 is about 19676.3289258947. The cubic root of 387157920 is about 728.8352728149.

The spelling of 387157920 in words is "three hundred eighty-seven million, one hundred fifty-seven thousand, nine hundred twenty".