389015540 has 24 divisors (see below), whose sum is σ = 828126600. Its totient is φ = 153474048.

The previous prime is 389015489. The next prime is 389015551. The reversal of 389015540 is 45510983.

It can be written as a sum of positive squares in 4 ways, for example, as 26646244 + 362369296 = 5162^2 + 19036^2 .

It is a super-3 number, since 3×389015540³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 389015540.

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, 131765 + ... + 134684.

It is an arithmetic number, because the mean of its divisors is an integer number (34505275).

Almost surely, 2^389015540 is an apocalyptic number.

It is an amenable number.

389015540 is an abundant number, since it is smaller than the sum of its proper divisors (439111060).

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

389015540 is a wasteful number, since it uses less digits than its factorization.

389015540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266531 (or 266529 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 389015540 is about 19723.4768740200. The cubic root of 389015540 is about 729.9990867568. Note that the first 3 decimals are identical.

The spelling of 389015540 in words is "three hundred eighty-nine million, fifteen thousand, five hundred forty".