717719940 has 432 divisors, whose sum is σ = 2778502272. Its totient is φ = 152285184.

The previous prime is 717719921. The next prime is 717719963. The reversal of 717719940 is 49917717.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9831744 + ... + 9831816.

Almost surely, 2^717719940 is an apocalyptic number.

717719940 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 717719940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389251136).

717719940 is an abundant number, since it is smaller than the sum of its proper divisors (2060782332).

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

717719940 is a wasteful number, since it uses less digits than its factorization.

717719940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 45.

The square root of 717719940 is about 26790.2956310676. The cubic root of 717719940 is about 895.3338496321. Note that the first 3 decimals are identical.

The spelling of 717719940 in words is "seven hundred seventeen million, seven hundred nineteen thousand, nine hundred forty".