722290752 has 126 divisors (see below), whose sum is σ = 2111057754. Its totient is φ = 236113920.

The previous prime is 722290729. The next prime is 722290771. The reversal of 722290752 is 257092227.

It can be written as a sum of positive squares in 3 ways, for example, as 76317696 + 645973056 = 8736^2 + 25416^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2143128 + ... + 2143464.

Almost surely, 2^722290752 is an apocalyptic number.

722290752 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 722290752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055528877).

722290752 is an abundant number, since it is smaller than the sum of its proper divisors (1388767002).

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

722290752 is a wasteful number, since it uses less digits than its factorization.

722290752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 722290752 is about 26875.4674750040. The cubic root of 722290752 is about 897.2304788373.

The spelling of 722290752 in words is "seven hundred twenty-two million, two hundred ninety thousand, seven hundred fifty-two".