1724138985 has 16 divisors (see below), whose sum is σ = 2772489600. Its totient is φ = 914918400.

The previous prime is 1724138951. The next prime is 1724138993. The reversal of 1724138985 is 5898314271.

It is not a de Polignac number, because 1724138985 - 2⁶ = 1724138921 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285816 + ... + 291785.

It is an arithmetic number, because the mean of its divisors is an integer number (173280600).

Almost surely, 2^1724138985 is an apocalyptic number.

1724138985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1724138985 is a deficient number, since it is larger than the sum of its proper divisors (1048350615).

1724138985 is a wasteful number, since it uses less digits than its factorization.

1724138985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577808.

The product of its digits is 483840, while the sum is 48.

The square root of 1724138985 is about 41522.7526182935. The cubic root of 1724138985 is about 1199.1055800375.

The spelling of 1724138985 in words is "one billion, seven hundred twenty-four million, one hundred thirty-eight thousand, nine hundred eighty-five".