1379132840 has 16 divisors (see below), whose sum is σ = 3103048980. Its totient is φ = 551653120.

The previous prime is 1379132809. The next prime is 1379132849. The reversal of 1379132840 is 482319731.

It can be written as a sum of positive squares in 2 ways, for example, as 1315803076 + 63329764 = 36274^2 + 7958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1379132794 and 1379132803.

It is not an unprimeable number, because it can be changed into a prime (1379132849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17239121 + ... + 17239200.

Almost surely, 2^1379132840 is an apocalyptic number.

1379132840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1379132840 is an abundant number, since it is smaller than the sum of its proper divisors (1723916140).

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

1379132840 is a wasteful number, since it uses less digits than its factorization.

1379132840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34478332 (or 34478328 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1379132840 is about 37136.6778266446. The cubic root of 1379132840 is about 1113.1030344242.

The spelling of 1379132840 in words is "one billion, three hundred seventy-nine million, one hundred thirty-two thousand, eight hundred forty".