722429280 has 288 divisors, whose sum is σ = 2709461664. Its totient is φ = 181149696.

The previous prime is 722429251. The next prime is 722429291. The reversal of 722429280 is 82924227.

It is a happy number.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 660414 + ... + 661506.

It is an arithmetic number, because the mean of its divisors is an integer number (9407853).

Almost surely, 2^722429280 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 722429280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354730832).

722429280 is an abundant number, since it is smaller than the sum of its proper divisors (1987032384).

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

722429280 is a wasteful number, since it uses less digits than its factorization.

722429280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 722429280 is about 26878.0445717318. The cubic root of 722429280 is about 897.2878350559.

The spelling of 722429280 in words is "seven hundred twenty-two million, four hundred twenty-nine thousand, two hundred eighty".