718981940 has 12 divisors (see below), whose sum is σ = 1509862116. Its totient is φ = 287592768.

The previous prime is 718981937. The next prime is 718981999. The reversal of 718981940 is 49189817.

It can be written as a sum of positive squares in 2 ways, for example, as 250778896 + 468203044 = 15836^2 + 21638^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17974529 + ... + 17974568.

It is an arithmetic number, because the mean of its divisors is an integer number (125821843).

Almost surely, 2^718981940 is an apocalyptic number.

It is an amenable number.

718981940 is an abundant number, since it is smaller than the sum of its proper divisors (790880176).

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

718981940 is a wasteful number, since it uses less digits than its factorization.

718981940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35949106 (or 35949104 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 718981940 is about 26813.8385912946. The cubic root of 718981940 is about 895.8583112608.

The spelling of 718981940 in words is "seven hundred eighteen million, nine hundred eighty-one thousand, nine hundred forty".