1128772800 has 672 divisors, whose sum is σ = 4592116800. Its totient is φ = 268369920.

The previous prime is 1128772789. The next prime is 1128772807. The reversal of 1128772800 is 82778211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1128772807) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 21297574 + ... + 21297626.

Almost surely, 2^1128772800 is an apocalyptic number.

1128772800 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 1128772800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2296058400).

1128772800 is an abundant number, since it is smaller than the sum of its proper divisors (3463344000).

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

1128772800 is a wasteful number, since it uses less digits than its factorization.

1128772800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 1128772800 is about 33597.2141702255. The cubic root of 1128772800 is about 1041.2032424635.

The spelling of 1128772800 in words is "one billion, one hundred twenty-eight million, seven hundred seventy-two thousand, eight hundred".