1722240400 has 60 divisors (see below), whose sum is σ = 4280390100. Its totient is φ = 665136640.

The previous prime is 1722240379. The next prime is 1722240409. The reversal of 1722240400 is 40422271.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 95570176 + 1626670224 = 9776^2 + 40332^2 .

It is a super-2 number, since 2×1722240400² = 5932223990784320000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1722240409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62635 + ... + 85834.

It is an arithmetic number, because the mean of its divisors is an integer number (71339835).

Almost surely, 2^1722240400 is an apocalyptic number.

1722240400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1722240400 is an abundant number, since it is smaller than the sum of its proper divisors (2558149700).

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

1722240400 is a wasteful number, since it uses less digits than its factorization.

1722240400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148516 (or 148505 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 1722240400 is about 41499.8843371882. The cubic root of 1722240400 is about 1198.6652752345.

Adding to 1722240400 its reverse (40422271), we get a palindrome (1762662671).

The spelling of 1722240400 in words is "one billion, seven hundred twenty-two million, two hundred forty thousand, four hundred".