1389028970 has 24 divisors (see below), whose sum is σ = 2908457604. Its totient is φ = 476238336.

The previous prime is 1389028943. The next prime is 1389029017. The reversal of 1389028970 is 798209831.

It can be written as a sum of positive squares in 2 ways, for example, as 1283000761 + 106028209 = 35819^2 + 10297^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1416887 + ... + 1417866.

Almost surely, 2^1389028970 is an apocalyptic number.

1389028970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389028970 is an abundant number, since it is smaller than the sum of its proper divisors (1519428634).

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

1389028970 is a wasteful number, since it uses less digits than its factorization.

1389028970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834774 (or 2834767 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1389028970 is about 37269.6789629318. The cubic root of 1389028970 is about 1115.7590921739.

The spelling of 1389028970 in words is "one billion, three hundred eighty-nine million, twenty-eight thousand, nine hundred seventy".