813284736 has 64 divisors (see below), whose sum is σ = 2356689600. Its totient is φ = 246448640.

The previous prime is 813284723. The next prime is 813284741. The reversal of 813284736 is 637482318.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×813284736² = 1322864123621179392, which contains 22 as substring.

It is a congruent number.

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, 92046 + ... + 100493.

It is an arithmetic number, because the mean of its divisors is an integer number (36823275).

Almost surely, 2^813284736 is an apocalyptic number.

It is an amenable number.

813284736 is an abundant number, since it is smaller than the sum of its proper divisors (1543404864).

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

813284736 is a wasteful number, since it uses less digits than its factorization.

813284736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192567 (or 192555 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 813284736 is about 28518.1474854171. The cubic root of 813284736 is about 933.4281064759.

The spelling of 813284736 in words is "eight hundred thirteen million, two hundred eighty-four thousand, seven hundred thirty-six".