1129985190 has 96 divisors (see below), whose sum is σ = 3005982720. Its totient is φ = 294435648.

The previous prime is 1129985173. The next prime is 1129985191. The reversal of 1129985190 is 915899211.

1129985190 is a `hidden beast` number, since 1 + 129 + 9 + 8 + 519 + 0 = 666.

It is a super-2 number, since 2×1129985190² = 2553733059238672200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129985191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 731559 + ... + 733101.

It is an arithmetic number, because the mean of its divisors is an integer number (31312320).

Almost surely, 2^1129985190 is an apocalyptic number.

1129985190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1129985190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1502991360).

1129985190 is an abundant number, since it is smaller than the sum of its proper divisors (1875997530).

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

1129985190 is a wasteful number, since it uses less digits than its factorization.

1129985190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738 (or 1735 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 45.

The square root of 1129985190 is about 33615.2523417570. The cubic root of 1129985190 is about 1041.5758869013.

The spelling of 1129985190 in words is "one billion, one hundred twenty-nine million, nine hundred eighty-five thousand, one hundred ninety".