289321740 has 192 divisors, whose sum is σ = 958809600. Its totient is φ = 72223488.

The previous prime is 289321727. The next prime is 289321763. The reversal of 289321740 is 47123982.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 289321695 and 289321704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1672294 + ... + 1672466.

It is an arithmetic number, because the mean of its divisors is an integer number (4993800).

Almost surely, 2^289321740 is an apocalyptic number.

289321740 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 289321740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479404800).

289321740 is an abundant number, since it is smaller than the sum of its proper divisors (669487860).

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

289321740 is a wasteful number, since it uses less digits than its factorization.

289321740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 289321740 is about 17009.4603088987. The cubic root of 289321740 is about 661.3941603899.

The spelling of 289321740 in words is "two hundred eighty-nine million, three hundred twenty-one thousand, seven hundred forty".