389277312 has 64 divisors (see below), whose sum is σ = 1056067200. Its totient is φ = 126992384.

The previous prime is 389277307. The next prime is 389277313. The reversal of 389277312 is 213772983.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (389277313) 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, 7264 + ... + 28832.

It is an arithmetic number, because the mean of its divisors is an integer number (16501050).

Almost surely, 2^389277312 is an apocalyptic number.

389277312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389277312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528033600).

389277312 is an abundant number, since it is smaller than the sum of its proper divisors (666789888).

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

389277312 is a wasteful number, since it uses less digits than its factorization.

389277312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21633 (or 21621 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 389277312 is about 19730.1118091105. Note that the first 3 decimals coincide. The cubic root of 389277312 is about 730.1627909919.

The spelling of 389277312 in words is "three hundred eighty-nine million, two hundred seventy-seven thousand, three hundred twelve".