812992680 has 64 divisors (see below), whose sum is σ = 2709979200. Its totient is φ = 216797760.

The previous prime is 812992657. The next prime is 812992703. The reversal of 812992680 is 86299218.

It is an interprime number because it is at equal distance from previous prime (812992657) and next prime (812992703).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375306 + ... + 377465.

It is an arithmetic number, because the mean of its divisors is an integer number (42343425).

Almost surely, 2^812992680 is an apocalyptic number.

It is an amenable number.

812992680 is an abundant number, since it is smaller than the sum of its proper divisors (1896986520).

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

812992680 is a wasteful number, since it uses less digits than its factorization.

812992680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752791 (or 752781 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 812992680 is about 28513.0264966734. The cubic root of 812992680 is about 933.3163596686.

The spelling of 812992680 in words is "eight hundred twelve million, nine hundred ninety-two thousand, six hundred eighty".