722655 has 32 divisors (see below), whose sum is σ = 1321920. Its totient is φ = 374400.

The previous prime is 722639. The next prime is 722663. The reversal of 722655 is 556227.

722655 is a `hidden beast` number, since 7 + 2 + 2 + 655 = 666.

It is not a de Polignac number, because 722655 - 2⁴ = 722639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (4200) is a multiple of the sum of its prime factors (168).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722655.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7105 + ... + 7205.

It is an arithmetic number, because the mean of its divisors is an integer number (41310).

2⁷²²⁶⁵⁵ is an apocalyptic number.

722655 is a deficient number, since it is larger than the sum of its proper divisors (599265).

722655 is a wasteful number, since it uses less digits than its factorization.

722655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 162 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 722655 is about 850.0911715810. The cubic root of 722655 is about 89.7381276599.

The spelling of 722655 in words is "seven hundred twenty-two thousand, six hundred fifty-five".