1399379650 has 96 divisors (see below), whose sum is σ = 2835903312. Its totient is φ = 511795200.

The previous prime is 1399379609. The next prime is 1399379669. The reversal of 1399379650 is 569739931.

It can be written as a sum of positive squares in 24 ways, for example, as 6671889 + 1392707761 = 2583^2 + 37319^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7103352 + ... + 7103548.

Almost surely, 2^1399379650 is an apocalyptic number.

1399379650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1399379650 is an abundant number, since it is smaller than the sum of its proper divisors (1436523662).

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

1399379650 is a wasteful number, since it uses less digits than its factorization.

1399379650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 52.

The square root of 1399379650 is about 37408.2831736502. The cubic root of 1399379650 is about 1118.5236846498.

The spelling of 1399379650 in words is "one billion, three hundred ninety-nine million, three hundred seventy-nine thousand, six hundred fifty".