389904516 has 45 divisors (see below), whose sum is σ = 1020217429. Its totient is φ = 129849696.

The previous prime is 389904511. The next prime is 389904539. The reversal of 389904516 is 615409983.

It is a happy number.

The square root of 389904516 is 19746.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 110880900 + 279023616 = 10530^2 + 16704^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389904511) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 354880 + ... + 355976.

Almost surely, 2^389904516 is an apocalyptic number.

389904516 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

389904516 is the 19746-th square number.

It is an amenable number.

389904516 is an abundant number, since it is smaller than the sum of its proper divisors (630312913).

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

389904516 is an equidigital number, since it uses as much as digits as its factorization.

389904516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The cubic root of 389904516 is about 730.5547269145.

The spelling of 389904516 in words is "three hundred eighty-nine million, nine hundred four thousand, five hundred sixteen".