1129644280 has 16 divisors (see below), whose sum is σ = 2541699720. Its totient is φ = 451857696.

The previous prime is 1129644251. The next prime is 1129644283. The reversal of 1129644280 is 824469211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129644283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14120514 + ... + 14120593.

Almost surely, 2^1129644280 is an apocalyptic number.

1129644280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1129644280 is an abundant number, since it is smaller than the sum of its proper divisors (1412055440).

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

1129644280 is a wasteful number, since it uses less digits than its factorization.

1129644280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28241118 (or 28241114 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1129644280 is about 33610.1811955842. The cubic root of 1129644280 is about 1041.4711305577.

The spelling of 1129644280 in words is "one billion, one hundred twenty-nine million, six hundred forty-four thousand, two hundred eighty".