1111088889 has 27 divisors (see below), whose sum is σ = 1651097487. Its totient is φ = 719992800.

The previous prime is 1111088833. The next prime is 1111088921. The reversal of 1111088889 is 9888801111.

The square root of 1111088889 is 33333.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 53538489 + 1057550400 = 7317^2 + 32520^2 .

It is not a de Polignac number, because 1111088889 - 2¹³ = 1111080697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1111088809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4099824 + ... + 4100094.

Almost surely, 2^1111088889 is an apocalyptic number.

1111088889 is the 33333-rd square number.

1111088889 is the 16667-th centered octagonal number.

It is an amenable number.

1111088889 is a deficient number, since it is larger than the sum of its proper divisors (540008598).

1111088889 is an frugal number, since it uses more digits than its factorization.

1111088889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 45.

The cubic root of 1111088889 is about 1035.7372636787.

Multiplying 1111088889 by its product of nonzero digits (36864), we get a square (40959180804096 = 6399936²).

It can be divided in two parts, 11110 and 88889, that added together give a palindrome (99999).

The spelling of 1111088889 in words is "one billion, one hundred eleven million, eighty-eight thousand, eight hundred eighty-nine".