1121366728 has 40 divisors (see below), whose sum is σ = 2205126630. Its totient is φ = 534287040.

The previous prime is 1121366717. The next prime is 1121366731. The reversal of 1121366728 is 8276631211.

It can be written as a sum of positive squares in only one way, i.e., 1107691524 + 13675204 = 33282^2 + 3698^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 26078275 + ... + 26078317.

Almost surely, 2^1121366728 is an apocalyptic number.

It is an amenable number.

1121366728 is a deficient number, since it is larger than the sum of its proper divisors (1083759902).

1121366728 is an frugal number, since it uses more digits than its factorization.

1121366728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 86 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 1121366728 is about 33486.8142408322. The cubic root of 1121366728 is about 1038.9210728904.

Adding to 1121366728 its reverse (8276631211), we get a palindrome (9397997939).

The spelling of 1121366728 in words is "one billion, one hundred twenty-one million, three hundred sixty-six thousand, seven hundred twenty-eight".