726438 has 16 divisors (see below), whose sum is σ = 1488816. Its totient is φ = 236160.

The previous prime is 726431. The next prime is 726457. The reversal of 726438 is 834627.

726438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231 + ... + 1722.

It is an arithmetic number, because the mean of its divisors is an integer number (93051).

2⁷²⁶⁴³⁸ is an apocalyptic number.

726438 is an abundant number, since it is smaller than the sum of its proper divisors (762378).

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

726438 is a wasteful number, since it uses less digits than its factorization.

726438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999.

The product of its digits is 8064, while the sum is 30.

The square root of 726438 is about 852.3133226695. The cubic root of 726438 is about 89.8944441492.

The spelling of 726438 in words is "seven hundred twenty-six thousand, four hundred thirty-eight".