722448 has 60 divisors (see below), whose sum is σ = 2103660. Its totient is φ = 231168.

The previous prime is 722431. The next prime is 722459. The reversal of 722448 is 844227.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 186624 = 732^2 + 432^2 .

It is a super-2 number, since 2×722448² = 1043862225408, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4090 + ... + 4262.

It is an arithmetic number, because the mean of its divisors is an integer number (35061).

2⁷²²⁴⁴⁸ 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 722448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051830).

722448 is an abundant number, since it is smaller than the sum of its proper divisors (1381212).

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

722448 is a wasteful number, since it uses less digits than its factorization.

722448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 207 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 722448 is about 849.9694112143. The cubic root of 722448 is about 89.7295585334.

The spelling of 722448 in words is "seven hundred twenty-two thousand, four hundred forty-eight".