289998225 has 120 divisors (see below), whose sum is σ = 600640128. Its totient is φ = 137116800.

The previous prime is 289998221. The next prime is 289998227. The reversal of 289998225 is 522899982.

It is not a de Polignac number, because 289998225 - 2² = 289998221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289998221) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1046787 + ... + 1047063.

Almost surely, 2^289998225 is an apocalyptic number.

289998225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

289998225 is an abundant number, since it is smaller than the sum of its proper divisors (310641903).

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

289998225 is a wasteful number, since it uses less digits than its factorization.

289998225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 343 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 289998225 is about 17029.3342500522. The cubic root of 289998225 is about 661.9092443501.

It can be divided in two parts, 2899 and 98225, that added together give a square (101124 = 318²).

The spelling of 289998225 in words is "two hundred eighty-nine million, nine hundred ninety-eight thousand, two hundred twenty-five".