726188 has 12 divisors (see below), whose sum is σ = 1289232. Its totient is φ = 357840.

The previous prime is 726181. The next prime is 726191. The reversal of 726188 is 881627.

It is a super-2 number, since 2×726188² = 1054698022688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (726181) by changing a digit.

726188 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 3 ways as a sum of consecutive naturals, for example, 995 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (107436).

2⁷²⁶¹⁸⁸ is an apocalyptic number.

It is an amenable number.

726188 is a deficient number, since it is larger than the sum of its proper divisors (563044).

726188 is a wasteful number, since it uses less digits than its factorization.

726188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632 (or 2630 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 726188 is about 852.1666503683. The cubic root of 726188 is about 89.8841307251.

The spelling of 726188 in words is "seven hundred twenty-six thousand, one hundred eighty-eight".