815048 has 32 divisors (see below), whose sum is σ = 1746360. Its totient is φ = 353280.

The previous prime is 815047. The next prime is 815053. The reversal of 815048 is 840518.

It can be written as a sum of positive squares in 4 ways, for example, as 605284 + 209764 = 778^2 + 458^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (815047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1538 + ... + 1998.

2⁸¹⁵⁰⁴⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 815048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873180).

815048 is an abundant number, since it is smaller than the sum of its proper divisors (931312).

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

815048 is a wasteful number, since it uses less digits than its factorization.

815048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 815048 is about 902.8000886132. The cubic root of 815048 is about 93.4102200910.

The spelling of 815048 in words is "eight hundred fifteen thousand, forty-eight".