718344978 has 48 divisors (see below), whose sum is σ = 1567364256. Its totient is φ = 219373440.

The previous prime is 718344953. The next prime is 718345003. The reversal of 718344978 is 879443817.

It is an interprime number because it is at equal distance from previous prime (718344953) and next prime (718345003).

It is a self number, because there is not a number n which added to its sum of digits gives 718344978.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136333 + ... + 141503.

It is an arithmetic number, because the mean of its divisors is an integer number (32653422).

Almost surely, 2^718344978 is an apocalyptic number.

718344978 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 718344978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783682128).

718344978 is an abundant number, since it is smaller than the sum of its proper divisors (849019278).

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

718344978 is a wasteful number, since it uses less digits than its factorization.

718344978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339 (or 5326 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 718344978 is about 26801.9584732161. The cubic root of 718344978 is about 895.5936795348.

It can be divided in two parts, 718 and 344978, that added together give a triangular number (345696 = T₈₃₁).

The spelling of 718344978 in words is "seven hundred eighteen million, three hundred forty-four thousand, nine hundred seventy-eight".