289994280 has 32 divisors (see below), whose sum is σ = 869983200. Its totient is φ = 77331776.

The previous prime is 289994269. The next prime is 289994293. The reversal of 289994280 is 82499982.

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, 1208190 + ... + 1208429.

It is an arithmetic number, because the mean of its divisors is an integer number (27186975).

Almost surely, 2^289994280 is an apocalyptic number.

289994280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289994280 is an abundant number, since it is smaller than the sum of its proper divisors (579988920).

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

289994280 is a wasteful number, since it uses less digits than its factorization.

289994280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416633 (or 2416629 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 289994280 is about 17029.2184201155. The cubic root of 289994280 is about 661.9062429021.

It can be divided in two parts, 2899 and 94280, that added together give a palindrome (97179).

The spelling of 289994280 in words is "two hundred eighty-nine million, nine hundred ninety-four thousand, two hundred eighty".