726418 has 32 divisors (see below), whose sum is σ = 1399680. Its totient is φ = 274560.

The previous prime is 726413. The next prime is 726419. The reversal of 726418 is 814627.

It is a super-2 number, since 2×726418² = 1055366221448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726413) by changing a digit.

726418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8118 + ... + 8206.

It is an arithmetic number, because the mean of its divisors is an integer number (43740).

2⁷²⁶⁴¹⁸ is an apocalyptic number.

726418 is a deficient number, since it is larger than the sum of its proper divisors (673262).

726418 is a wasteful number, since it uses less digits than its factorization.

726418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162.

The product of its digits is 2688, while the sum is 28.

The square root of 726418 is about 852.3015898143. The cubic root of 726418 is about 89.8936191624.

Subtracting 726418 from its reverse (814627), we obtain a square (88209 = 297²).

The spelling of 726418 in words is "seven hundred twenty-six thousand, four hundred eighteen".