289241988 has 48 divisors (see below), whose sum is σ = 785877120. Its totient is φ = 81080064.

The previous prime is 289241977. The next prime is 289241993. The reversal of 289241988 is 889142982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 289241988.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28033 + ... + 36936.

It is an arithmetic number, because the mean of its divisors is an integer number (16372440).

Almost surely, 2^289241988 is an apocalyptic number.

289241988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

289241988 is an abundant number, since it is smaller than the sum of its proper divisors (496635132).

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

289241988 is a wasteful number, since it uses less digits than its factorization.

289241988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65036 (or 65034 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 289241988 is about 17007.1158048624. The cubic root of 289241988 is about 661.3333833527. Note that the first 4 decimals are identical.

The spelling of 289241988 in words is "two hundred eighty-nine million, two hundred forty-one thousand, nine hundred eighty-eight".