812021896 has 16 divisors (see below), whose sum is σ = 1740047040. Its totient is φ = 348009360.

The previous prime is 812021887. The next prime is 812021927. The reversal of 812021896 is 698120218.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7250140 + ... + 7250251.

It is an arithmetic number, because the mean of its divisors is an integer number (108752940).

Almost surely, 2^812021896 is an apocalyptic number.

It is an amenable number.

812021896 is an abundant number, since it is smaller than the sum of its proper divisors (928025144).

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

812021896 is a wasteful number, since it uses less digits than its factorization.

812021896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14500404 (or 14500400 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 812021896 is about 28495.9978944412. The cubic root of 812021896 is about 932.9447247268.

The spelling of 812021896 in words is "eight hundred twelve million, twenty-one thousand, eight hundred ninety-six".