717997420 has 24 divisors (see below), whose sum is σ = 1723194144. Its totient is φ = 246170496.

The previous prime is 717997391. The next prime is 717997471. The reversal of 717997420 is 24799717.

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, 2564137 + ... + 2564416.

It is an arithmetic number, because the mean of its divisors is an integer number (71799756).

Almost surely, 2^717997420 is an apocalyptic number.

717997420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

717997420 is an abundant number, since it is smaller than the sum of its proper divisors (1005196724).

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

717997420 is a wasteful number, since it uses less digits than its factorization.

717997420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128569 (or 5128567 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 717997420 is about 26795.4738715329. The cubic root of 717997420 is about 895.4492173929.

The spelling of 717997420 in words is "seven hundred seventeen million, nine hundred ninety-seven thousand, four hundred twenty".