811019928 has 32 divisors (see below), whose sum is σ = 2115705600. Its totient is φ = 258585888.

The previous prime is 811019917. The next prime is 811019929. The reversal of 811019928 is 829910118.

It is a super-2 number, since 2×811019928² = 1315506647226250368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811019929) 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, 734068 + ... + 735171.

It is an arithmetic number, because the mean of its divisors is an integer number (66115800).

Almost surely, 2^811019928 is an apocalyptic number.

It is an amenable number.

811019928 is an abundant number, since it is smaller than the sum of its proper divisors (1304685672).

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

811019928 is a wasteful number, since it uses less digits than its factorization.

811019928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469271 (or 1469267 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 39.

The square root of 811019928 is about 28478.4116130096. The cubic root of 811019928 is about 932.5608411932.

The spelling of 811019928 in words is "eight hundred eleven million, nineteen thousand, nine hundred twenty-eight".