389991024 has 100 divisors (see below), whose sum is σ = 1139163696. Its totient is φ = 128798208.

The previous prime is 389991023. The next prime is 389991031. The reversal of 389991024 is 420199983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389991023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 145117 + ... + 147779.

Almost surely, 2^389991024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389991024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569581848).

389991024 is an abundant number, since it is smaller than the sum of its proper divisors (749172672).

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

389991024 is a wasteful number, since it uses less digits than its factorization.

389991024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796 (or 2781 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 389991024 is about 19748.1903981099. The cubic root of 389991024 is about 730.6087522398.

The spelling of 389991024 in words is "three hundred eighty-nine million, nine hundred ninety-one thousand, twenty-four".