812425680 has 320 divisors, whose sum is σ = 3154083840. Its totient is φ = 190425600.

The previous prime is 812425661. The next prime is 812425709. The reversal of 812425680 is 86524218.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 736009 + ... + 737111.

It is an arithmetic number, because the mean of its divisors is an integer number (9856512).

Almost surely, 2^812425680 is an apocalyptic number.

812425680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812425680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1577041920).

812425680 is an abundant number, since it is smaller than the sum of its proper divisors (2341658160).

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

812425680 is a wasteful number, since it uses less digits than its factorization.

812425680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 812425680 is about 28503.0819386255. The cubic root of 812425680 is about 933.0993370312.

Adding to 812425680 its reverse (86524218), we get a palindrome (898949898).

The spelling of 812425680 in words is "eight hundred twelve million, four hundred twenty-five thousand, six hundred eighty".