722045400 has 72 divisors (see below), whose sum is σ = 2240383020. Its totient is φ = 192369920.

The previous prime is 722045339. The next prime is 722045449. The reversal of 722045400 is 4540227.

It is a super-2 number, since 2×722045400² = 1042699119322320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 657652 + ... + 658748.

Almost surely, 2^722045400 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 722045400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1120191510).

722045400 is an abundant number, since it is smaller than the sum of its proper divisors (1518337620).

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

722045400 is a wasteful number, since it uses less digits than its factorization.

722045400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 722045400 is about 26870.9024783315. The cubic root of 722045400 is about 897.1288751446.

Multiplying 722045400 by its sum of digits (24), we get a square (17329089600 = 131640²).

722045400 divided by its sum of digits (24) gives a square (30085225 = 5485²).

Adding to 722045400 its reverse (4540227), we get a palindrome (726585627).

The spelling of 722045400 in words is "seven hundred twenty-two million, forty-five thousand, four hundred".