289009880 has 32 divisors (see below), whose sum is σ = 665398800. Its totient is φ = 112914816.

The previous prime is 289009873. The next prime is 289009883. The reversal of 289009880 is 88900982.

It is a super-2 number, since 2×289009880² = 167053421475228800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) 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 (289009883) 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, 82295 + ... + 85734.

Almost surely, 2^289009880 is an apocalyptic number.

289009880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289009880 is an abundant number, since it is smaller than the sum of its proper divisors (376388920).

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

289009880 is a wasteful number, since it uses less digits than its factorization.

289009880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168083 (or 168079 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 289009880 is about 17000.2905857518. The cubic root of 289009880 is about 661.1564359597.

The spelling of 289009880 in words is "two hundred eighty-nine million, nine thousand, eight hundred eighty".