289923228 has 36 divisors (see below), whose sum is σ = 837556720. Its totient is φ = 82835136.

The previous prime is 289923217. The next prime is 289923229. The reversal of 289923228 is 822329982.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289923229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 574993 + ... + 575496.

Almost surely, 2^289923228 is an apocalyptic number.

289923228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

289923228 is an abundant number, since it is smaller than the sum of its proper divisors (547633492).

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

289923228 is a wasteful number, since it uses less digits than its factorization.

289923228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150506 (or 1150501 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 289923228 is about 17027.1321131892. The cubic root of 289923228 is about 661.8521802221.

The spelling of 289923228 in words is "two hundred eighty-nine million, nine hundred twenty-three thousand, two hundred twenty-eight".