722542240 has 144 divisors (see below), whose sum is σ = 2072552832. Its totient is φ = 236898816.

The previous prime is 722542231. The next prime is 722542259. The reversal of 722542240 is 42245227.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 722542199 and 722542208.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178317 + ... + 182323.

It is an arithmetic number, because the mean of its divisors is an integer number (14392728).

Almost surely, 2^722542240 is an apocalyptic number.

722542240 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 722542240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1036276416).

722542240 is an abundant number, since it is smaller than the sum of its proper divisors (1350010592).

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

722542240 is a wasteful number, since it uses less digits than its factorization.

722542240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4059 (or 4044 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 722542240 is about 26880.1458329377. The cubic root of 722542240 is about 897.3345996571.

Adding to 722542240 its reverse (42245227), we get a palindrome (764787467).

The spelling of 722542240 in words is "seven hundred twenty-two million, five hundred forty-two thousand, two hundred forty".