1389434560 has 28 divisors (see below), whose sum is σ = 3308591808. Its totient is φ = 555773696.

The previous prime is 1389434551. The next prime is 1389434593. The reversal of 1389434560 is 654349831.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2170672 + ... + 2171311.

Almost surely, 2^1389434560 is an apocalyptic number.

1389434560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389434560 is an abundant number, since it is smaller than the sum of its proper divisors (1919157248).

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

1389434560 is an equidigital number, since it uses as much as digits as its factorization.

1389434560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4342000 (or 4341990 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 1389434560 is about 37275.1198522553. The cubic root of 1389434560 is about 1115.8676804276.

The spelling of 1389434560 in words is "one billion, three hundred eighty-nine million, four hundred thirty-four thousand, five hundred sixty".