289221880 has 32 divisors (see below), whose sum is σ = 651615840. Its totient is φ = 115534720.

The previous prime is 289221869. The next prime is 289221929. The reversal of 289221880 is 88122982.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28437 + ... + 37243.

It is an arithmetic number, because the mean of its divisors is an integer number (20362995).

Almost surely, 2^289221880 is an apocalyptic number.

289221880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289221880 is an abundant number, since it is smaller than the sum of its proper divisors (362393960).

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

289221880 is a wasteful number, since it uses less digits than its factorization.

289221880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9639 (or 9635 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 289221880 is about 17006.5246302706. The cubic root of 289221880 is about 661.3180577771.

The spelling of 289221880 in words is "two hundred eighty-nine million, two hundred twenty-one thousand, eight hundred eighty".