289244640 has 48 divisors (see below), whose sum is σ = 911122128. Its totient is φ = 77131776.

The previous prime is 289244639. The next prime is 289244653. The reversal of 289244640 is 46442982.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 300817 + ... + 301776.

It is an arithmetic number, because the mean of its divisors is an integer number (18981711).

Almost surely, 2^289244640 is an apocalyptic number.

289244640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289244640 is an abundant number, since it is smaller than the sum of its proper divisors (621877488).

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

289244640 is a wasteful number, since it uses less digits than its factorization.

289244640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602611 (or 602603 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 289244640 is about 17007.1937720483. The cubic root of 289244640 is about 661.3354045562.

The spelling of 289244640 in words is "two hundred eighty-nine million, two hundred forty-four thousand, six hundred forty".