1129286988 has 96 divisors (see below), whose sum is σ = 2994969600. Its totient is φ = 367892928.

The previous prime is 1129286923. The next prime is 1129286989. The reversal of 1129286988 is 8896829211.

It is a super-2 number, since 2×1129286988² = 2550578202532224288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1129286989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 912306 + ... + 913542.

It is an arithmetic number, because the mean of its divisors is an integer number (31197600).

Almost surely, 2^1129286988 is an apocalyptic number.

1129286988 is a gapful number since it is divisible by the number (18) 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 1129286988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497484800).

1129286988 is an abundant number, since it is smaller than the sum of its proper divisors (1865682612).

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

1129286988 is a wasteful number, since it uses less digits than its factorization.

1129286988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436 (or 1428 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 1129286988 is about 33604.8655405731. The cubic root of 1129286988 is about 1041.3613176583.

The spelling of 1129286988 in words is "one billion, one hundred twenty-nine million, two hundred eighty-six thousand, nine hundred eighty-eight".