387641328 has 40 divisors (see below), whose sum is σ = 1018387200. Its totient is φ = 127022784.

The previous prime is 387641263. The next prime is 387641339. The reversal of 387641328 is 823146783.

It is a self number, because there is not a number n which added to its sum of digits gives 387641328.

It is a congruent number.

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, 65608 + ... + 71271.

It is an arithmetic number, because the mean of its divisors is an integer number (25459680).

Almost surely, 2^387641328 is an apocalyptic number.

It is an amenable number.

387641328 is an abundant number, since it is smaller than the sum of its proper divisors (630745872).

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

387641328 is a wasteful number, since it uses less digits than its factorization.

387641328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136949 (or 136943 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 387641328 is about 19688.6090925692. The cubic root of 387641328 is about 729.1384895357.

The spelling of 387641328 in words is "three hundred eighty-seven million, six hundred forty-one thousand, three hundred twenty-eight".