1122112728 has 48 divisors (see below), whose sum is σ = 3315335400. Its totient is φ = 340033920.

The previous prime is 1122112703. The next prime is 1122112729. The reversal of 1122112728 is 8272112211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122112729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 707613 + ... + 709196.

Almost surely, 2^1122112728 is an apocalyptic number.

1122112728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1122112728 is an abundant number, since it is smaller than the sum of its proper divisors (2193222672).

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

1122112728 is a wasteful number, since it uses less digits than its factorization.

1122112728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416832 (or 1416825 counting only the distinct ones).

The product of its digits is 896, while the sum is 27.

The square root of 1122112728 is about 33497.9511015226. The cubic root of 1122112728 is about 1039.1514058992.

Adding to 1122112728 its reverse (8272112211), we get a palindrome (9394224939).

The spelling of 1122112728 in words is "one billion, one hundred twenty-two million, one hundred twelve thousand, seven hundred twenty-eight".