1089238612 has 72 divisors (see below), whose sum is σ = 2520701120. Its totient is φ = 402019200.

The previous prime is 1089238573. The next prime is 1089238613. The reversal of 1089238612 is 2168329801.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089238613) 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, 55912 + ... + 72832.

Almost surely, 2^1089238612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089238612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260350560).

1089238612 is an abundant number, since it is smaller than the sum of its proper divisors (1431462508).

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

1089238612 is a wasteful number, since it uses less digits than its factorization.

1089238612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16973 (or 16960 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1089238612 is about 33003.6151353151. The cubic root of 1089238612 is about 1028.9027848457.

The spelling of 1089238612 in words is "one billion, eighty-nine million, two hundred thirty-eight thousand, six hundred twelve".