815368444 has 24 divisors (see below), whose sum is σ = 1560243888. Its totient is φ = 369757440.

The previous prime is 815368409. The next prime is 815368447. The reversal of 815368444 is 444863518.

It is a super-2 number, since 2×815368444² = 1329651398941962272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 815368444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815368447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2347 + ... + 40450.

It is an arithmetic number, because the mean of its divisors is an integer number (65010162).

Almost surely, 2^815368444 is an apocalyptic number.

It is an amenable number.

815368444 is a deficient number, since it is larger than the sum of its proper divisors (744875444).

815368444 is a wasteful number, since it uses less digits than its factorization.

815368444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43245 (or 43243 counting only the distinct ones).

The product of its digits is 368640, while the sum is 43.

The square root of 815368444 is about 28554.6571332944. The cubic root of 815368444 is about 934.2246019740.

The spelling of 815368444 in words is "eight hundred fifteen million, three hundred sixty-eight thousand, four hundred forty-four".