1129867920 has 160 divisors (see below), whose sum is σ = 3902547840. Its totient is φ = 300464640.

The previous prime is 1129867901. The next prime is 1129867951. The reversal of 1129867920 is 297689211.

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1492182 + ... + 1492938.

It is an arithmetic number, because the mean of its divisors is an integer number (24390924).

Almost surely, 2^1129867920 is an apocalyptic number.

1129867920 is a gapful number since it is divisible by the number (10) 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 1129867920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1951273920).

1129867920 is an abundant number, since it is smaller than the sum of its proper divisors (2772679920).

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

1129867920 is a wasteful number, since it uses less digits than its factorization.

1129867920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 1129867920 is about 33613.5079990173. The cubic root of 1129867920 is about 1041.5398540309.

The spelling of 1129867920 in words is "one billion, one hundred twenty-nine million, eight hundred sixty-seven thousand, nine hundred twenty".