812439628 has 48 divisors (see below), whose sum is σ = 1908958464. Its totient is φ = 292184640.

The previous prime is 812439587. The next prime is 812439629. The reversal of 812439628 is 826934218.

It is not an unprimeable number, because it can be changed into a prime (812439629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97450 + ... + 105457.

It is an arithmetic number, because the mean of its divisors is an integer number (39769968).

Almost surely, 2^812439628 is an apocalyptic number.

It is an amenable number.

812439628 is an abundant number, since it is smaller than the sum of its proper divisors (1096518836).

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

812439628 is a wasteful number, since it uses less digits than its factorization.

812439628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202942 (or 202940 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 812439628 is about 28503.3266128710. The cubic root of 812439628 is about 933.1046769228.

The spelling of 812439628 in words is "eight hundred twelve million, four hundred thirty-nine thousand, six hundred twenty-eight".