1369728818 has 8 divisors (see below), whose sum is σ = 2059339548. Its totient is φ = 683282304.

The previous prime is 1369728799. The next prime is 1369728847. The reversal of 1369728818 is 8188279631.

It can be written as a sum of positive squares in 2 ways, for example, as 1359913129 + 9815689 = 36877^2 + 3133^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1369728818.

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, 789971 + ... + 791702.

Almost surely, 2^1369728818 is an apocalyptic number.

1369728818 is a deficient number, since it is larger than the sum of its proper divisors (689610730).

1369728818 is a wasteful number, since it uses less digits than its factorization.

1369728818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582108.

The product of its digits is 1161216, while the sum is 53.

The square root of 1369728818 is about 37009.8475814208. The cubic root of 1369728818 is about 1110.5672554431.

The spelling of 1369728818 in words is "one billion, three hundred sixty-nine million, seven hundred twenty-eight thousand, eight hundred eighteen".