1729138684 has 48 divisors (see below), whose sum is σ = 3762770368. Its totient is φ = 676988928.

The previous prime is 1729138679. The next prime is 1729138687. The reversal of 1729138684 is 4868319271.

It is a super-5 number, since 5×1729138684⁵ (a number of 47 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729138687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10822 + ... + 59794.

Almost surely, 2^1729138684 is an apocalyptic number.

1729138684 is a gapful number since it is divisible by the number (14) 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 1729138684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881385184).

1729138684 is an abundant number, since it is smaller than the sum of its proper divisors (2033631684).

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

1729138684 is a wasteful number, since it uses less digits than its factorization.

1729138684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49094 (or 49092 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 1729138684 is about 41582.9133659488. The cubic root of 1729138684 is about 1200.2635263832.

The spelling of 1729138684 in words is "one billion, seven hundred twenty-nine million, one hundred thirty-eight thousand, six hundred eighty-four".