811013472 has 72 divisors (see below), whose sum is σ = 2391761736. Its totient is φ = 270335232.

The previous prime is 811013443. The next prime is 811013521. The reversal of 811013472 is 274310118.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44373 + ... + 59924.

It is an arithmetic number, because the mean of its divisors is an integer number (33218913).

Almost surely, 2^811013472 is an apocalyptic number.

It is an amenable number.

811013472 is an abundant number, since it is smaller than the sum of its proper divisors (1580748264).

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

811013472 is a wasteful number, since it uses less digits than its factorization.

811013472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104322 (or 104302 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 811013472 is about 28478.2982637657. The cubic root of 811013472 is about 932.5583666840.

The spelling of 811013472 in words is "eight hundred eleven million, thirteen thousand, four hundred seventy-two".