812383128 has 64 divisors (see below), whose sum is σ = 2287576800. Its totient is φ = 267079680.

The previous prime is 812383123. The next prime is 812383129. The reversal of 812383128 is 821383218.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 812383092 and 812383101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812383123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9993 + ... + 41528.

Almost surely, 2^812383128 is an apocalyptic number.

It is an amenable number.

812383128 is an abundant number, since it is smaller than the sum of its proper divisors (1475193672).

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

812383128 is a wasteful number, since it uses less digits than its factorization.

812383128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51609 (or 51599 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 812383128 is about 28502.3354832547. The cubic root of 812383128 is about 933.0830459262.

The spelling of 812383128 in words is "eight hundred twelve million, three hundred eighty-three thousand, one hundred twenty-eight".