815955460 has 24 divisors (see below), whose sum is σ = 1814301720. Its totient is φ = 307183104.

The previous prime is 815955451. The next prime is 815955499. The reversal of 815955460 is 64559518.

It can be written as a sum of positive squares in 4 ways, for example, as 124055044 + 691900416 = 11138^2 + 26304^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199595 + ... + 1200274.

It is an arithmetic number, because the mean of its divisors is an integer number (75595905).

Almost surely, 2^815955460 is an apocalyptic number.

It is an amenable number.

815955460 is an abundant number, since it is smaller than the sum of its proper divisors (998346260).

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

815955460 is a wasteful number, since it uses less digits than its factorization.

815955460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399895 (or 2399893 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 815955460 is about 28564.9340975960. The cubic root of 815955460 is about 934.4487432766.

The spelling of 815955460 in words is "eight hundred fifteen million, nine hundred fifty-five thousand, four hundred sixty".