1729138330 has 16 divisors (see below), whose sum is σ = 3163473864. Its totient is φ = 680316480.

The previous prime is 1729138309. The next prime is 1729138337. The reversal of 1729138330 is 338319271.

It can be written as a sum of positive squares in 4 ways, for example, as 961682121 + 767456209 = 31011^2 + 27703^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1729138330.

It is not an unprimeable number, because it can be changed into a prime (1729138337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1416717 + ... + 1417936.

Almost surely, 2^1729138330 is an apocalyptic number.

1729138330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1729138330 is a deficient number, since it is larger than the sum of its proper divisors (1434335534).

1729138330 is a wasteful number, since it uses less digits than its factorization.

1729138330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834721.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1729138330 is about 41582.9091093925. The cubic root of 1729138330 is about 1200.2634444748.

The spelling of 1729138330 in words is "one billion, seven hundred twenty-nine million, one hundred thirty-eight thousand, three hundred thirty".