1379883728 has 20 divisors (see below), whose sum is σ = 2693043780. Its totient is φ = 684904704.

The previous prime is 1379883691. The next prime is 1379883731. The reversal of 1379883728 is 8273889731.

It can be written as a sum of positive squares in 2 ways, for example, as 848673424 + 531210304 = 29132^2 + 23048^2 .

It is a super-4 number, since 4×1379883728⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

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, 312563 + ... + 316946.

It is an arithmetic number, because the mean of its divisors is an integer number (134652189).

Almost surely, 2^1379883728 is an apocalyptic number.

It is an amenable number.

1379883728 is a deficient number, since it is larger than the sum of its proper divisors (1313160052).

1379883728 is a wasteful number, since it uses less digits than its factorization.

1379883728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629654 (or 629648 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 1379883728 is about 37146.7862405350. The cubic root of 1379883728 is about 1113.3050125664.

The spelling of 1379883728 in words is "one billion, three hundred seventy-nine million, eight hundred eighty-three thousand, seven hundred twenty-eight".