389372540 has 12 divisors (see below), whose sum is σ = 817682376. Its totient is φ = 155749008.

The previous prime is 389372537. The next prime is 389372551. The reversal of 389372540 is 45273983.

It is a super-2 number, since 2×389372540² = 303221949812103200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9734294 + ... + 9734333.

It is an arithmetic number, because the mean of its divisors is an integer number (68140198).

Almost surely, 2^389372540 is an apocalyptic number.

It is an amenable number.

389372540 is an abundant number, since it is smaller than the sum of its proper divisors (428309836).

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

389372540 is a wasteful number, since it uses less digits than its factorization.

389372540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19468636 (or 19468634 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 389372540 is about 19732.5249271349. The cubic root of 389372540 is about 730.2223254772. Note that the first 3 decimals are identical.

The spelling of 389372540 in words is "three hundred eighty-nine million, three hundred seventy-two thousand, five hundred forty".