722921472 has 288 divisors, whose sum is σ = 2575722240. Its totient is φ = 190218240.

The previous prime is 722921453. The next prime is 722921509. The reversal of 722921472 is 274129227.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1677097 + ... + 1677527.

It is an arithmetic number, because the mean of its divisors is an integer number (8943480).

Almost surely, 2^722921472 is an apocalyptic number.

722921472 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722921472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287861120).

722921472 is an abundant number, since it is smaller than the sum of its proper divisors (1852800768).

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

722921472 is a wasteful number, since it uses less digits than its factorization.

722921472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 456 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 722921472 is about 26887.1990359725. The cubic root of 722921472 is about 897.4915632491.

The spelling of 722921472 in words is "seven hundred twenty-two million, nine hundred twenty-one thousand, four hundred seventy-two".