1722491440 has 80 divisors (see below), whose sum is σ = 4159733760. Its totient is φ = 662618880.

The previous prime is 1722491423. The next prime is 1722491461. The reversal of 1722491440 is 441942271.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×1722491440³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1722491396 and 1722491405.

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 15 ways as a sum of consecutive naturals, for example, 412081 + ... + 416239.

It is an arithmetic number, because the mean of its divisors is an integer number (51996672).

Almost surely, 2^1722491440 is an apocalyptic number.

1722491440 is a gapful number since it is divisible by the number (10) 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 1722491440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2079866880).

1722491440 is an abundant number, since it is smaller than the sum of its proper divisors (2437242320).

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

1722491440 is a wasteful number, since it uses less digits than its factorization.

1722491440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370 (or 4364 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1722491440 is about 41502.9088137205. The cubic root of 1722491440 is about 1198.7235130026.

The spelling of 1722491440 in words is "one billion, seven hundred twenty-two million, four hundred ninety-one thousand, four hundred forty".