1129421388 has 48 divisors (see below), whose sum is σ = 2733409280. Its totient is φ = 362577600.

The previous prime is 1129421369. The next prime is 1129421393. The reversal of 1129421388 is 8831249211.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71298 + ... + 85686.

Almost surely, 2^1129421388 is an apocalyptic number.

It is an amenable number.

1129421388 is an abundant number, since it is smaller than the sum of its proper divisors (1603987892).

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

1129421388 is a wasteful number, since it uses less digits than its factorization.

1129421388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14638 (or 14636 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 1129421388 is about 33606.8651915051. The cubic root of 1129421388 is about 1041.4026279159.

The spelling of 1129421388 in words is "one billion, one hundred twenty-nine million, four hundred twenty-one thousand, three hundred eighty-eight".