722140 has 12 divisors (see below), whose sum is σ = 1516536. Its totient is φ = 288848.

The previous prime is 722123. The next prime is 722147. The reversal of 722140 is 41227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722147) by changing a digit.

722140 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, 18034 + ... + 18073.

It is an arithmetic number, because the mean of its divisors is an integer number (126378).

2⁷²²¹⁴⁰ is an apocalyptic number.

It is an amenable number.

722140 is an abundant number, since it is smaller than the sum of its proper divisors (794396).

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

722140 is a wasteful number, since it uses less digits than its factorization.

722140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36116 (or 36114 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 722140 is about 849.7882089085. The cubic root of 722140 is about 89.7168053053.

Adding to 722140 its reverse (41227), we get a palindrome (763367).

The spelling of 722140 in words is "seven hundred twenty-two thousand, one hundred forty", and thus it is an iban number.