1129732398 has 24 divisors (see below), whose sum is σ = 2453296248. Its totient is φ = 375724752.

The previous prime is 1129732393. The next prime is 1129732477. The reversal of 1129732398 is 8932379211.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129732391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62865 + ... + 78812.

It is an arithmetic number, because the mean of its divisors is an integer number (102220677).

Almost surely, 2^1129732398 is an apocalyptic number.

1129732398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1129732398 is an abundant number, since it is smaller than the sum of its proper divisors (1323563850).

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

1129732398 is a wasteful number, since it uses less digits than its factorization.

1129732398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142128 (or 142125 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1129732398 is about 33611.4920525704. The cubic root of 1129732398 is about 1041.4982098689.

The spelling of 1129732398 in words is "one billion, one hundred twenty-nine million, seven hundred thirty-two thousand, three hundred ninety-eight".