289248340 has 24 divisors (see below), whose sum is σ = 620347392. Its totient is φ = 113237280.

The previous prime is 289248329. The next prime is 289248361. The reversal of 289248340 is 43842982.

It is a junction number, because it is equal to n+sod(n) for n = 289248293 and 289248302.

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, 152916 + ... + 154795.

It is an arithmetic number, because the mean of its divisors is an integer number (25847808).

Almost surely, 2^289248340 is an apocalyptic number.

289248340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289248340 is an abundant number, since it is smaller than the sum of its proper divisors (331099052).

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

289248340 is a wasteful number, since it uses less digits than its factorization.

289248340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307767 (or 307765 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 289248340 is about 17007.3025491993. The cubic root of 289248340 is about 661.3382244650.

The spelling of 289248340 in words is "two hundred eighty-nine million, two hundred forty-eight thousand, three hundred forty".