289248639 has 8 divisors (see below), whose sum is σ = 398963760. Its totient is φ = 186182976.

The previous prime is 289248637. The next prime is 289248691. The reversal of 289248639 is 936842982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289248639 - 2¹ = 289248637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 289248591 and 289248600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289248637) 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, 1662262 + ... + 1662435.

It is an arithmetic number, because the mean of its divisors is an integer number (49870470).

Almost surely, 2^289248639 is an apocalyptic number.

289248639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

289248639 is a deficient number, since it is larger than the sum of its proper divisors (109715121).

289248639 is a wasteful number, since it uses less digits than its factorization.

289248639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324729.

The product of its digits is 1492992, while the sum is 51.

The square root of 289248639 is about 17007.3113395387. The cubic root of 289248639 is about 661.3384523431.

The spelling of 289248639 in words is "two hundred eighty-nine million, two hundred forty-eight thousand, six hundred thirty-nine".