812452128 has 24 divisors (see below), whose sum is σ = 2132687088. Its totient is φ = 270817344.

The previous prime is 812452099. The next prime is 812452153. The reversal of 812452128 is 821254218.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 4231426 + ... + 4231617.

It is an arithmetic number, because the mean of its divisors is an integer number (88861962).

Almost surely, 2^812452128 is an apocalyptic number.

It is an amenable number.

812452128 is an abundant number, since it is smaller than the sum of its proper divisors (1320234960).

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

812452128 is a wasteful number, since it uses less digits than its factorization.

812452128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8463056 (or 8463048 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 812452128 is about 28503.5458846790. The cubic root of 812452128 is about 933.1094624060.

The spelling of 812452128 in words is "eight hundred twelve million, four hundred fifty-two thousand, one hundred twenty-eight".