718971440 has 40 divisors (see below), whose sum is σ = 1823575248. Its totient is φ = 261443840.

The previous prime is 718971431. The next prime is 718971503. The reversal of 718971440 is 44179817.

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

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 7 ways as a sum of consecutive naturals, for example, 407627 + ... + 409386.

Almost surely, 2^718971440 is an apocalyptic number.

It is an amenable number.

718971440 is an abundant number, since it is smaller than the sum of its proper divisors (1104603808).

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

718971440 is a wasteful number, since it uses less digits than its factorization.

718971440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817037 (or 817031 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 718971440 is about 26813.6427961588. The cubic root of 718971440 is about 895.8539502064.

It can be divided in two parts, 71897 and 1440, that added together give a palindrome (73337).

The spelling of 718971440 in words is "seven hundred eighteen million, nine hundred seventy-one thousand, four hundred forty".