389149640 has 64 divisors (see below), whose sum is σ = 1005480000. Its totient is φ = 134058240.

The previous prime is 389149639. The next prime is 389149679. The reversal of 389149640 is 46941983.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 389149591 and 389149600.

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, 14915 + ... + 31634.

It is an arithmetic number, because the mean of its divisors is an integer number (15710625).

Almost surely, 2^389149640 is an apocalyptic number.

It is an amenable number.

389149640 is an abundant number, since it is smaller than the sum of its proper divisors (616330360).

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

389149640 is a wasteful number, since it uses less digits than its factorization.

389149640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46590 (or 46586 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 389149640 is about 19726.8760831511. The cubic root of 389149640 is about 730.0829579832.

The spelling of 389149640 in words is "three hundred eighty-nine million, one hundred forty-nine thousand, six hundred forty".