1378680992 has 24 divisors (see below), whose sum is σ = 2923069716. Its totient is φ = 636314112.

The previous prime is 1378680959. The next prime is 1378681049. The reversal of 1378680992 is 2990868731.

It can be written as a sum of positive squares in 2 ways, for example, as 1261954576 + 116726416 = 35524^2 + 10804^2 .

It is a super-2 number, since 2×1378680992² = 3801522555404208128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1656653 + ... + 1657484.

Almost surely, 2^1378680992 is an apocalyptic number.

It is an amenable number.

1378680992 is an abundant number, since it is smaller than the sum of its proper divisors (1544388724).

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

1378680992 is a wasteful number, since it uses less digits than its factorization.

1378680992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314160 (or 3314152 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 1378680992 is about 37130.5937469360. The cubic root of 1378680992 is about 1112.9814584350.

The spelling of 1378680992 in words is "one billion, three hundred seventy-eight million, six hundred eighty thousand, nine hundred ninety-two".