812947662 has 24 divisors (see below), whose sum is σ = 1822125240. Its totient is φ = 261638160.

The previous prime is 812947643. The next prime is 812947669. The reversal of 812947662 is 266749218.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812947669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 778164 + ... + 779207.

It is an arithmetic number, because the mean of its divisors is an integer number (75921885).

Almost surely, 2^812947662 is an apocalyptic number.

812947662 is an abundant number, since it is smaller than the sum of its proper divisors (1009177578).

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

812947662 is a wasteful number, since it uses less digits than its factorization.

812947662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557408 (or 1557405 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 812947662 is about 28512.2370570953. The cubic root of 812947662 is about 933.2991324486.

The spelling of 812947662 in words is "eight hundred twelve million, nine hundred forty-seven thousand, six hundred sixty-two".