1389213090 has 24 divisors (see below), whose sum is σ = 3611954268. Its totient is φ = 370456800.

The previous prime is 1389213061. The next prime is 1389213113. The reversal of 1389213090 is 903129831.

It can be written as a sum of positive squares in 2 ways, for example, as 1344175569 + 45037521 = 36663^2 + 6711^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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, 7717761 + ... + 7717940.

Almost surely, 2^1389213090 is an apocalyptic number.

1389213090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389213090 is an abundant number, since it is smaller than the sum of its proper divisors (2222741178).

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

1389213090 is a wasteful number, since it uses less digits than its factorization.

1389213090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15435714 (or 15435711 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1389213090 is about 37272.1489855361. The cubic root of 1389213090 is about 1115.8083890789.

The spelling of 1389213090 in words is "one billion, three hundred eighty-nine million, two hundred thirteen thousand, ninety".