812439552 has 48 divisors (see below), whose sum is σ = 2165992920. Its totient is φ = 270811136.

The previous prime is 812439547. The next prime is 812439569. The reversal of 812439552 is 255934218.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 812439552.

It is a congruent number.

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, 59973 + ... + 72260.

Almost surely, 2^812439552 is an apocalyptic number.

It is an amenable number.

812439552 is an abundant number, since it is smaller than the sum of its proper divisors (1353553368).

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

812439552 is a wasteful number, since it uses less digits than its factorization.

812439552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132258 (or 132238 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 812439552 is about 28503.3252796932. The cubic root of 812439552 is about 933.1046478269.

The spelling of 812439552 in words is "eight hundred twelve million, four hundred thirty-nine thousand, five hundred fifty-two".