389777538 has 8 divisors (see below), whose sum is σ = 779555088. Its totient is φ = 129925844.

The previous prime is 389777501. The next prime is 389777551. The reversal of 389777538 is 835777983.

It is a sphenic number, since it is the product of 3 distinct primes.

389777538 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32481456 + ... + 32481467.

It is an arithmetic number, because the mean of its divisors is an integer number (97444386).

Almost surely, 2^389777538 is an apocalyptic number.

389777538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

389777538 is a wasteful number, since it uses less digits than its factorization.

389777538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64962928.

The product of its digits is 8890560, while the sum is 57.

The square root of 389777538 is about 19742.7844540733. The cubic root of 389777538 is about 730.4754130944.

The spelling of 389777538 in words is "three hundred eighty-nine million, seven hundred seventy-seven thousand, five hundred thirty-eight".