12088989 has 36 divisors (see below), whose sum is σ = 20353788. Its totient is φ = 6885120.

The previous prime is 12088987. The next prime is 12088991. The reversal of 12088989 is 98988021.

12088989 = T₂₆₂ + T₂₆₃ + ... + T₄₄₈.

It is an interprime number because it is at equal distance from previous prime (12088987) and next prime (12088991).

It can be written as a sum of positive squares in 2 ways, for example, as 6125625 + 5963364 = 2475^2 + 2442^2 .

It is not a de Polignac number, because 12088989 - 2¹ = 12088987 is a prime.

It is a super-2 number, since 2×12088989² = 292287310084242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12088981) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18187 + ... + 18839.

It is an arithmetic number, because the mean of its divisors is an integer number (565383).

Almost surely, 2^12088989 is an apocalyptic number.

It is an amenable number.

12088989 is a deficient number, since it is larger than the sum of its proper divisors (8264799).

12088989 is a wasteful number, since it uses less digits than its factorization.

12088989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 12088989 is about 3476.9223459836. The cubic root of 12088989 is about 229.5073829627.

The spelling of 12088989 in words is "twelve million, eighty-eight thousand, nine hundred eighty-nine".