315728169 has 16 divisors (see below), whose sum is σ = 424881600. Its totient is φ = 208537920.

The previous prime is 315728159. The next prime is 315728173. The reversal of 315728169 is 961827513.

It is not a de Polignac number, because 315728169 - 2⁷ = 315728041 is a prime.

It is a super-2 number, since 2×315728169² = 199368553400185122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 315728169.

It is not an unprimeable number, because it can be changed into a prime (315728159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254619 + ... + 255855.

It is an arithmetic number, because the mean of its divisors is an integer number (26555100).

Almost surely, 2^315728169 is an apocalyptic number.

It is an amenable number.

315728169 is a deficient number, since it is larger than the sum of its proper divisors (109153431).

315728169 is a wasteful number, since it uses less digits than its factorization.

315728169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960.

The product of its digits is 90720, while the sum is 42.

The square root of 315728169 is about 17768.7413454077. The cubic root of 315728169 is about 680.9330969010.

The spelling of 315728169 in words is "three hundred fifteen million, seven hundred twenty-eight thousand, one hundred sixty-nine".