722100 has 72 divisors (see below), whose sum is σ = 2187360. Its totient is φ = 183680.

The previous prime is 722093. The next prime is 722119. The reversal of 722100 is 1227.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

722100 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 23 ways as a sum of consecutive naturals, for example, 8659 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (30380).

2⁷²²¹⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093680).

722100 is an abundant number, since it is smaller than the sum of its proper divisors (1465260).

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

722100 is a wasteful number, since it uses less digits than its factorization.

722100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 722100 is about 849.7646733067. The cubic root of 722100 is about 89.7151487759.

Adding to 722100 its reverse (1227), we get a palindrome (723327).

The spelling of 722100 in words is "seven hundred twenty-two thousand, one hundred", and thus it is an iban number.