1399132880 has 20 divisors (see below), whose sum is σ = 3252984132. Its totient is φ = 559653120.

The previous prime is 1399132879. The next prime is 1399132883. The reversal of 1399132880 is 882319931.

It can be written as a sum of positive squares in 2 ways, for example, as 400320064 + 998812816 = 20008^2 + 31604^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399132883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8744501 + ... + 8744660.

Almost surely, 2^1399132880 is an apocalyptic number.

1399132880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399132880 is an abundant number, since it is smaller than the sum of its proper divisors (1853851252).

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

1399132880 is a wasteful number, since it uses less digits than its factorization.

1399132880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17489174 (or 17489168 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 1399132880 is about 37404.9846945564. The cubic root of 1399132880 is about 1118.4579330586.

The spelling of 1399132880 in words is "one billion, three hundred ninety-nine million, one hundred thirty-two thousand, eight hundred eighty".