289929240 has 128 divisors (see below), whose sum is σ = 999864000. Its totient is φ = 74640384.

The previous prime is 289929223. The next prime is 289929251. The reversal of 289929240 is 42929982.

289929240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 26692 + ... + 35948.

Almost surely, 2^289929240 is an apocalyptic number.

289929240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289929240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (499932000).

289929240 is an abundant number, since it is smaller than the sum of its proper divisors (709934760).

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

289929240 is a wasteful number, since it uses less digits than its factorization.

289929240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9306 (or 9296 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 289929240 is about 17027.3086540416. The cubic root of 289929240 is about 661.8567550284.

The spelling of 289929240 in words is "two hundred eighty-nine million, nine hundred twenty-nine thousand, two hundred forty".