289897456 has 40 divisors (see below), whose sum is σ = 584761680. Its totient is φ = 139055616.

The previous prime is 289897453. The next prime is 289897463. The reversal of 289897456 is 654798982.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 289897456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289897453) 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, 73716 + ... + 77548.

It is an arithmetic number, because the mean of its divisors is an integer number (14619042).

Almost surely, 2^289897456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289897456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292380840).

289897456 is an abundant number, since it is smaller than the sum of its proper divisors (294864224).

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

289897456 is a wasteful number, since it uses less digits than its factorization.

289897456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033 (or 4027 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 58.

The square root of 289897456 is about 17026.3753042155. The cubic root of 289897456 is about 661.8325684097.

The spelling of 289897456 in words is "two hundred eighty-nine million, eight hundred ninety-seven thousand, four hundred fifty-six".