819116720 has 40 divisors (see below), whose sum is σ = 1965886080. Its totient is φ = 317076480.

The previous prime is 819116719. The next prime is 819116759. The reversal of 819116720 is 27611918.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162665 + ... + 167624.

It is an arithmetic number, because the mean of its divisors is an integer number (49147152).

Almost surely, 2^819116720 is an apocalyptic number.

819116720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

819116720 is an abundant number, since it is smaller than the sum of its proper divisors (1146769360).

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

819116720 is a wasteful number, since it uses less digits than its factorization.

819116720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330333 (or 330327 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 819116720 is about 28620.2152332927. The cubic root of 819116720 is about 935.6539678363.

The spelling of 819116720 in words is "eight hundred nineteen million, one hundred sixteen thousand, seven hundred twenty".