818015838 has 32 divisors (see below), whose sum is σ = 1714749696. Its totient is φ = 259657728.

The previous prime is 818015813. The next prime is 818015839. The reversal of 818015838 is 838510818.

It is a super-2 number, since 2×818015838² = 1338299822437684488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 818015838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818015839) 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, 18270 + ... + 44382.

It is an arithmetic number, because the mean of its divisors is an integer number (53585928).

Almost surely, 2^818015838 is an apocalyptic number.

818015838 is an abundant number, since it is smaller than the sum of its proper divisors (896733858).

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

818015838 is a wasteful number, since it uses less digits than its factorization.

818015838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26368.

The product of its (nonzero) digits is 61440, while the sum is 42.

The square root of 818015838 is about 28600.9761721519. The cubic root of 818015838 is about 935.2346110720.

The spelling of 818015838 in words is "eight hundred eighteen million, fifteen thousand, eight hundred thirty-eight".