722472240 has 320 divisors, whose sum is σ = 2674400256. Its totient is φ = 157925376.

The previous prime is 722472221. The next prime is 722472241. The reversal of 722472240 is 42274227.

It is a super-2 number, since 2×722472240² = 1043932275141235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 722472198 and 722472207.

It is not an unprimeable number, because it can be changed into a prime (722472241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5273452 + ... + 5273588.

Almost surely, 2^722472240 is an apocalyptic number.

722472240 is a gapful number since it is divisible by the number (70) 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 722472240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337200128).

722472240 is an abundant number, since it is smaller than the sum of its proper divisors (1951928016).

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

722472240 is a wasteful number, since it uses less digits than its factorization.

722472240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 722472240 is about 26878.8437251307. The cubic root of 722472240 is about 897.3056207513.

The spelling of 722472240 in words is "seven hundred twenty-two million, four hundred seventy-two thousand, two hundred forty".