389973642 has 16 divisors (see below), whose sum is σ = 825826752. Its totient is φ = 122344640.

The previous prime is 389973641. The next prime is 389973691. The reversal of 389973642 is 246379983.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (389973641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1911534 + ... + 1911737.

It is an arithmetic number, because the mean of its divisors is an integer number (51614172).

Almost surely, 2^389973642 is an apocalyptic number.

389973642 is an abundant number, since it is smaller than the sum of its proper divisors (435853110).

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

389973642 is a wasteful number, since it uses less digits than its factorization.

389973642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823293.

The product of its digits is 1959552, while the sum is 51.

The square root of 389973642 is about 19747.7503022496. The cubic root of 389973642 is about 730.5978976054.

The spelling of 389973642 in words is "three hundred eighty-nine million, nine hundred seventy-three thousand, six hundred forty-two".