389281556 has 12 divisors (see below), whose sum is σ = 681784320. Its totient is φ = 194486040.

The previous prime is 389281547. The next prime is 389281559. The reversal of 389281556 is 655182983.

It is a super-2 number, since 2×389281556² = 303080259683562272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 389281556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389281559) by changing a digit.

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, 32930 + ... + 43161.

It is an arithmetic number, because the mean of its divisors is an integer number (56815360).

Almost surely, 2^389281556 is an apocalyptic number.

It is an amenable number.

389281556 is a deficient number, since it is larger than the sum of its proper divisors (292502764).

389281556 is a wasteful number, since it uses less digits than its factorization.

389281556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77374 (or 77372 counting only the distinct ones).

The product of its digits is 518400, while the sum is 47.

The square root of 389281556 is about 19730.2193601592. The cubic root of 389281556 is about 730.1654444555.

It can be divided in two parts, 3892815 and 56, that multiplied together give a triangular number (217997640 = T₂₀₈₈₀).

The spelling of 389281556 in words is "three hundred eighty-nine million, two hundred eighty-one thousand, five hundred fifty-six".