726550 has 24 divisors (see below), whose sum is σ = 1475352. Its totient is φ = 264000.

The previous prime is 726533. The next prime is 726559. The reversal of 726550 is 55627.

726550 = T₁₀₀ + T₁₀₁ + ... + T₁₇₄.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726559) by changing a digit.

726550 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 11 ways as a sum of consecutive naturals, for example, 111 + ... + 1210.

It is an arithmetic number, because the mean of its divisors is an integer number (61473).

2⁷²⁶⁵⁵⁰ is an apocalyptic number.

726550 is an abundant number, since it is smaller than the sum of its proper divisors (748802).

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

726550 is a wasteful number, since it uses less digits than its factorization.

726550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 726550 is about 852.3790236743. The cubic root of 726550 is about 89.8990637957.

The spelling of 726550 in words is "seven hundred twenty-six thousand, five hundred fifty".