288742139 has 8 divisors (see below), whose sum is σ = 330801120. Its totient is φ = 246885696.

The previous prime is 288742123. The next prime is 288742141. The reversal of 288742139 is 931247882.

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

It is a cyclic number.

It is not a de Polignac number, because 288742139 - 2⁴ = 288742123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 288742139.

It is not an unprimeable number, because it can be changed into a prime (288742109) 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, 47564 + ... + 53289.

It is an arithmetic number, because the mean of its divisors is an integer number (41350140).

Almost surely, 2^288742139 is an apocalyptic number.

288742139 is a deficient number, since it is larger than the sum of its proper divisors (42058981).

288742139 is a wasteful number, since it uses less digits than its factorization.

288742139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101269.

The product of its digits is 193536, while the sum is 44.

The square root of 288742139 is about 16992.4141604423. The cubic root of 288742139 is about 660.9522060589.

It can be divided in two parts, 28874 and 2139, that added together give a palindrome (31013).

The spelling of 288742139 in words is "two hundred eighty-eight million, seven hundred forty-two thousand, one hundred thirty-nine".