1125728208 has 120 divisors (see below), whose sum is σ = 3510239616. Its totient is φ = 333849600.

The previous prime is 1125728173. The next prime is 1125728209. The reversal of 1125728208 is 8028275211.

1125728208 is a `hidden beast` number, since 1 + 1 + 2 + 572 + 82 + 0 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125728209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66888 + ... + 82008.

Almost surely, 2^1125728208 is an apocalyptic number.

1125728208 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 1125728208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755119808).

1125728208 is an abundant number, since it is smaller than the sum of its proper divisors (2384511408).

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

1125728208 is a wasteful number, since it uses less digits than its factorization.

1125728208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15193 (or 15184 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 1125728208 is about 33551.8733903191. The cubic root of 1125728208 is about 1040.2662681143.

The spelling of 1125728208 in words is "one billion, one hundred twenty-five million, seven hundred twenty-eight thousand, two hundred eight".