1722729924 has 96 divisors (see below), whose sum is σ = 4754736000. Its totient is φ = 537850368.

The previous prime is 1722729907. The next prime is 1722729947. The reversal of 1722729924 is 4299272271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1722729924.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177912 + ... + 187344.

It is an arithmetic number, because the mean of its divisors is an integer number (49528500).

Almost surely, 2^1722729924 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 1722729924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2377368000).

1722729924 is an abundant number, since it is smaller than the sum of its proper divisors (3032006076).

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

1722729924 is a wasteful number, since it uses less digits than its factorization.

1722729924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554 (or 9546 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 1722729924 is about 41505.7818141039. The cubic root of 1722729924 is about 1198.7788327136.

The spelling of 1722729924 in words is "one billion, seven hundred twenty-two million, seven hundred twenty-nine thousand, nine hundred twenty-four".