716915640 has 128 divisors (see below), whose sum is σ = 2463644160. Its totient is φ = 163490304.

The previous prime is 716915629. The next prime is 716915659. The reversal of 716915640 is 46519617.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547867 + ... + 549173.

It is an arithmetic number, because the mean of its divisors is an integer number (19247220).

Almost surely, 2^716915640 is an apocalyptic number.

716915640 is a gapful number since it is divisible by the number (70) 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 716915640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1231822080).

716915640 is an abundant number, since it is smaller than the sum of its proper divisors (1746728520).

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

716915640 is a wasteful number, since it uses less digits than its factorization.

716915640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 716915640 is about 26775.2803906887. The cubic root of 716915640 is about 894.9992780078. Note that the first 3 decimals are identical.

The spelling of 716915640 in words is "seven hundred sixteen million, nine hundred fifteen thousand, six hundred forty".