1379631240 has 96 divisors (see below), whose sum is σ = 4828725720. Its totient is φ = 339600384.

The previous prime is 1379631217. The next prime is 1379631257. The reversal of 1379631240 is 421369731.

1379631240 is a `hidden beast` number, since 13 + 7 + 9 + 631 + 2 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 751527396 + 628103844 = 27414^2 + 25062^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1379631195 and 1379631204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142717 + ... + 152076.

Almost surely, 2^1379631240 is an apocalyptic number.

1379631240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1379631240 is an abundant number, since it is smaller than the sum of its proper divisors (3449094480).

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

1379631240 is a wasteful number, since it uses less digits than its factorization.

1379631240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294823 (or 294816 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 1379631240 is about 37143.3875676412. The cubic root of 1379631240 is about 1113.2371050809.

The spelling of 1379631240 in words is "one billion, three hundred seventy-nine million, six hundred thirty-one thousand, two hundred forty".