289469940 has 96 divisors (see below), whose sum is σ = 880803840. Its totient is φ = 70761600.

The previous prime is 289469923. The next prime is 289470031. The reversal of 289469940 is 49964982.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31245 + ... + 39435.

It is an arithmetic number, because the mean of its divisors is an integer number (9175040).

Almost surely, 2^289469940 is an apocalyptic number.

289469940 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 289469940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440401920).

289469940 is an abundant number, since it is smaller than the sum of its proper divisors (591333900).

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

289469940 is a wasteful number, since it uses less digits than its factorization.

289469940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8253 (or 8251 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 289469940 is about 17013.8161504114. The cubic root of 289469940 is about 661.5070703095.

The spelling of 289469940 in words is "two hundred eighty-nine million, four hundred sixty-nine thousand, nine hundred forty".