815047854 has 16 divisors (see below), whose sum is σ = 1631000448. Its totient is φ = 271531832.

The previous prime is 815047801. The next prime is 815047867. The reversal of 815047854 is 458740518.

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 7 ways as a sum of consecutive naturals, for example, 25692 + ... + 47855.

It is an arithmetic number, because the mean of its divisors is an integer number (101937528).

Almost surely, 2^815047854 is an apocalyptic number.

815047854 is an abundant number, since it is smaller than the sum of its proper divisors (815952594).

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

815047854 is a wasteful number, since it uses less digits than its factorization.

815047854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75399.

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 815047854 is about 28549.0429611922. The cubic root of 815047854 is about 934.1021451349.

The spelling of 815047854 in words is "eight hundred fifteen million, forty-seven thousand, eight hundred fifty-four".