1379687328 has 72 divisors (see below), whose sum is σ = 3927976416. Its totient is φ = 459369600.

The previous prime is 1379687317. The next prime is 1379687341. The reversal of 1379687328 is 8237869731.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312013 + ... + 316403.

It is an arithmetic number, because the mean of its divisors is an integer number (54555228).

Almost surely, 2^1379687328 is an apocalyptic number.

1379687328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1379687328 is an abundant number, since it is smaller than the sum of its proper divisors (2548289088).

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

1379687328 is a wasteful number, since it uses less digits than its factorization.

1379687328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498 (or 5487 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1379687328 is about 37144.1425799546. The cubic root of 1379687328 is about 1113.2521908504.

It can be divided in two parts, 13796 and 87328, that added together give a square (101124 = 318²).

The spelling of 1379687328 in words is "one billion, three hundred seventy-nine million, six hundred eighty-seven thousand, three hundred twenty-eight".