387674640 has 80 divisors (see below), whose sum is σ = 1335331200. Its totient is φ = 103379328.

The previous prime is 387674633. The next prime is 387674671. The reversal of 387674640 is 46476783.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87580 + ... + 91899.

It is an arithmetic number, because the mean of its divisors is an integer number (16691640).

Almost surely, 2^387674640 is an apocalyptic number.

387674640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

387674640 is an abundant number, since it is smaller than the sum of its proper divisors (947656560).

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

387674640 is a wasteful number, since it uses less digits than its factorization.

387674640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179501 (or 179489 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The square root of 387674640 is about 19689.4550457853. The cubic root of 387674640 is about 729.1593751362.

The spelling of 387674640 in words is "three hundred eighty-seven million, six hundred seventy-four thousand, six hundred forty".