812702880 has 144 divisors (see below), whose sum is σ = 3025530144. Its totient is φ = 197015040.

The previous prime is 812702879. The next prime is 812702887. The reversal of 812702880 is 88207218.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812702887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9814 + ... + 41493.

It is an arithmetic number, because the mean of its divisors is an integer number (21010626).

Almost surely, 2^812702880 is an apocalyptic number.

812702880 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 812702880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512765072).

812702880 is an abundant number, since it is smaller than the sum of its proper divisors (2212827264).

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

812702880 is a wasteful number, since it uses less digits than its factorization.

812702880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51339 (or 51328 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 812702880 is about 28507.9441559717. The cubic root of 812702880 is about 933.2054495986.

The spelling of 812702880 in words is "eight hundred twelve million, seven hundred two thousand, eight hundred eighty".