289021968 has 30 divisors (see below), whose sum is σ = 808860494. Its totient is φ = 96340608.

The previous prime is 289021961. The next prime is 289021969. The reversal of 289021968 is 869120982.

It can be written as a sum of positive squares in only one way, i.e., 192432384 + 96589584 = 13872^2 + 9828^2 .

It is not an unprimeable number, because it can be changed into a prime (289021961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1003405 + ... + 1003692.

Almost surely, 2^289021968 is an apocalyptic number.

It is an amenable number.

289021968 is an abundant number, since it is smaller than the sum of its proper divisors (519838526).

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

289021968 is a wasteful number, since it uses less digits than its factorization.

289021968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007111 (or 2007102 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 289021968 is about 17000.6461053691. The cubic root of 289021968 is about 661.1656535771.

The spelling of 289021968 in words is "two hundred eighty-nine million, twenty-one thousand, nine hundred sixty-eight".