815488289 has 16 divisors (see below), whose sum is σ = 1031894016. Its totient is φ = 625957200.

The previous prime is 815488279. The next prime is 815488291. The reversal of 815488289 is 982884518.

It is a happy number.

It is not a de Polignac number, because 815488289 - 2²⁰ = 814439713 is a prime.

It is a super-2 number, since 2×815488289² = 1330042298992295042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 815488289.

It is not an unprimeable number, because it can be changed into a prime (815488229) 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, 73877 + ... + 84194.

It is an arithmetic number, because the mean of its divisors is an integer number (64493376).

Almost surely, 2^815488289 is an apocalyptic number.

It is an amenable number.

815488289 is a deficient number, since it is larger than the sum of its proper divisors (216405727).

815488289 is a wasteful number, since it uses less digits than its factorization.

815488289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158156.

The product of its digits is 1474560, while the sum is 53.

The square root of 815488289 is about 28556.7555755201. The cubic root of 815488289 is about 934.2703713286.

The spelling of 815488289 in words is "eight hundred fifteen million, four hundred eighty-eight thousand, two hundred eighty-nine".