289221432 has 32 divisors (see below), whose sum is σ = 723600000. Its totient is φ = 96334304.

The previous prime is 289221349. The next prime is 289221433. The reversal of 289221432 is 234122982.

It is a junction number, because it is equal to n+sod(n) for n = 289221393 and 289221402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289221433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34819 + ... + 42317.

It is an arithmetic number, because the mean of its divisors is an integer number (22612500).

Almost surely, 2^289221432 is an apocalyptic number.

It is an amenable number.

289221432 is an abundant number, since it is smaller than the sum of its proper divisors (434378568).

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

289221432 is a wasteful number, since it uses less digits than its factorization.

289221432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9115 (or 9111 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 289221432 is about 17006.5114588501. The cubic root of 289221432 is about 661.3177163199.

The spelling of 289221432 in words is "two hundred eighty-nine million, two hundred twenty-one thousand, four hundred thirty-two".