811024728 has 64 divisors (see below), whose sum is σ = 2203161600. Its totient is φ = 247847040.

The previous prime is 811024673. The next prime is 811024733. The reversal of 811024728 is 827420118.

It is a happy number.

It is a super-2 number, since 2×811024728² = 1315522218854947968, 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 15 ways as a sum of consecutive naturals, for example, 14551 + ... + 42822.

It is an arithmetic number, because the mean of its divisors is an integer number (34424400).

Almost surely, 2^811024728 is an apocalyptic number.

It is an amenable number.

811024728 is an abundant number, since it is smaller than the sum of its proper divisors (1392136872).

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

811024728 is a wasteful number, since it uses less digits than its factorization.

811024728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57432 (or 57428 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 811024728 is about 28478.4958872480. The cubic root of 811024728 is about 932.5626809685.

The spelling of 811024728 in words is "eight hundred eleven million, twenty-four thousand, seven hundred twenty-eight".