1723040240 has 20 divisors (see below), whose sum is σ = 4006068744. Its totient is φ = 689216064.

The previous prime is 1723040227. The next prime is 1723040261. The reversal of 1723040240 is 420403271.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10768922 + ... + 10769081.

Almost surely, 2^1723040240 is an apocalyptic number.

1723040240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1723040240 is an abundant number, since it is smaller than the sum of its proper divisors (2283028504).

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

1723040240 is a wasteful number, since it uses less digits than its factorization.

1723040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21538016 (or 21538010 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 1723040240 is about 41509.5198719523. The cubic root of 1723040240 is about 1198.8508072220.

The spelling of 1723040240 in words is "one billion, seven hundred twenty-three million, forty thousand, two hundred forty".