389478540 has 48 divisors (see below), whose sum is σ = 1189681920. Its totient is φ = 94418880.

The previous prime is 389478521. The next prime is 389478559. The reversal of 389478540 is 45874983.

It is an interprime number because it is at equal distance from previous prime (389478521) and next prime (389478559).

It is a self number, because there is not a number n which added to its sum of digits gives 389478540.

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, 294400 + ... + 295719.

It is an arithmetic number, because the mean of its divisors is an integer number (24785040).

Almost surely, 2^389478540 is an apocalyptic number.

389478540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389478540 is an abundant number, since it is smaller than the sum of its proper divisors (800203380).

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

389478540 is a wasteful number, since it uses less digits than its factorization.

389478540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590142 (or 590140 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 389478540 is about 19735.2106652045. The cubic root of 389478540 is about 730.2885829690.

The spelling of 389478540 in words is "three hundred eighty-nine million, four hundred seventy-eight thousand, five hundred forty".