1399328620 has 24 divisors (see below), whose sum is σ = 2944983888. Its totient is φ = 558513600.

The previous prime is 1399328617. The next prime is 1399328621. The reversal of 1399328620 is 268239931.

It is a super-2 number, since 2×1399328620² = 3916241173502208800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1399328621) 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, 66666 + ... + 85105.

It is an arithmetic number, because the mean of its divisors is an integer number (122707662).

Almost surely, 2^1399328620 is an apocalyptic number.

1399328620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399328620 is an abundant number, since it is smaller than the sum of its proper divisors (1545655268).

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

1399328620 is a wasteful number, since it uses less digits than its factorization.

1399328620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152241 (or 152239 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1399328620 is about 37407.6010992418. The cubic root of 1399328620 is about 1118.5100883972.

The spelling of 1399328620 in words is "one billion, three hundred ninety-nine million, three hundred twenty-eight thousand, six hundred twenty".