1316839728 has 40 divisors (see below), whose sum is σ = 3440070000. Its totient is φ = 434013184.

The previous prime is 1316839679. The next prime is 1316839729. The reversal of 1316839728 is 8279386131.

It is a super-2 number, since 2×1316839728² = 3468133738478227968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1316839729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149853 + ... + 158396.

It is an arithmetic number, because the mean of its divisors is an integer number (86001750).

Almost surely, 2^1316839728 is an apocalyptic number.

It is an amenable number.

1316839728 is an abundant number, since it is smaller than the sum of its proper divisors (2123230272).

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

1316839728 is a wasteful number, since it uses less digits than its factorization.

1316839728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308349 (or 308343 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 1316839728 is about 36288.2863745314. The cubic root of 1316839728 is about 1096.0851826098.

The spelling of 1316839728 in words is "one billion, three hundred sixteen million, eight hundred thirty-nine thousand, seven hundred twenty-eight".