387031680 has 384 divisors, whose sum is σ = 1584835200. Its totient is φ = 85155840.

The previous prime is 387031669. The next prime is 387031703. The reversal of 387031680 is 86130783.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1169115 + ... + 1169445.

It is an arithmetic number, because the mean of its divisors is an integer number (4127175).

Almost surely, 2^387031680 is an apocalyptic number.

387031680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387031680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792417600).

387031680 is an abundant number, since it is smaller than the sum of its proper divisors (1197803520).

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

387031680 is a wasteful number, since it uses less digits than its factorization.

387031680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 387031680 is about 19673.1207488797. The cubic root of 387031680 is about 728.7560474634.

The spelling of 387031680 in words is "three hundred eighty-seven million, thirty-one thousand, six hundred eighty".