718406 has 8 divisors (see below), whose sum is σ = 1160544. Its totient is φ = 331560.

The previous prime is 718391. The next prime is 718411. The reversal of 718406 is 604817.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×718406² = 1032214361672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 27631 = 718406 / (7 + 1 + 8 + 4 + 0 + 6).

It is a congruent number.

It is an unprimeable number.

718406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13790 + ... + 13841.

It is an arithmetic number, because the mean of its divisors is an integer number (145068).

2⁷¹⁸⁴⁰⁶ is an apocalyptic number.

718406 is a deficient number, since it is larger than the sum of its proper divisors (442138).

718406 is a wasteful number, since it uses less digits than its factorization.

718406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27646.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 718406 is about 847.5883434781. The cubic root of 718406 is about 89.5619038460.

The spelling of 718406 in words is "seven hundred eighteen thousand, four hundred six".