815089254 has 64 divisors (see below), whose sum is σ = 1947456000. Its totient is φ = 222501888.

The previous prime is 815089211. The next prime is 815089267. The reversal of 815089254 is 452980518.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114697 + ... + 121595.

It is an arithmetic number, because the mean of its divisors is an integer number (30429000).

Almost surely, 2^815089254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 815089254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (973728000).

815089254 is an abundant number, since it is smaller than the sum of its proper divisors (1132366746).

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

815089254 is a wasteful number, since it uses less digits than its factorization.

815089254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 815089254 is about 28549.7680200733. The cubic root of 815089254 is about 934.1179606374.

The spelling of 815089254 in words is "eight hundred fifteen million, eighty-nine thousand, two hundred fifty-four".