812207628 has 48 divisors (see below), whose sum is σ = 2109767520. Its totient is φ = 270216000.

The previous prime is 812207621. The next prime is 812207653. The reversal of 812207628 is 826702218.

It is a happy number.

812207628 is a `hidden beast` number, since 8 + 1 + 2 + 20 + 7 + 628 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 812207592 and 812207601.

It is not an unprimeable number, because it can be changed into a prime (812207621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51478 + ... + 65378.

It is an arithmetic number, because the mean of its divisors is an integer number (43953490).

Almost surely, 2^812207628 is an apocalyptic number.

It is an amenable number.

812207628 is an abundant number, since it is smaller than the sum of its proper divisors (1297559892).

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

812207628 is a wasteful number, since it uses less digits than its factorization.

812207628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14455 (or 14447 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 812207628 is about 28499.2566218840. The cubic root of 812207628 is about 933.0158494428.

The spelling of 812207628 in words is "eight hundred twelve million, two hundred seven thousand, six hundred twenty-eight".