1129312800 has 864 divisors, whose sum is σ = 5236539840. Its totient is φ = 232243200.

The previous prime is 1129312787. The next prime is 1129312801. The reversal of 1129312800 is 82139211.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129312801) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11642352 + ... + 11642448.

It is an arithmetic number, because the mean of its divisors is an integer number (6060810).

Almost surely, 2^1129312800 is an apocalyptic number.

1129312800 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 1129312800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2618269920).

1129312800 is an abundant number, since it is smaller than the sum of its proper divisors (4107227040).

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

1129312800 is a wasteful number, since it uses less digits than its factorization.

1129312800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1129312800 is about 33605.2495899078. The cubic root of 1129312800 is about 1041.3692516951.

The spelling of 1129312800 in words is "one billion, one hundred twenty-nine million, three hundred twelve thousand, eight hundred".