288439830 has 96 divisors (see below), whose sum is σ = 860169024. Its totient is φ = 65691648.

The previous prime is 288439819. The next prime is 288439831. The reversal of 288439830 is 38934882.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288439831) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 221742 + ... + 223038.

It is an arithmetic number, because the mean of its divisors is an integer number (8960094).

Almost surely, 2^288439830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 288439830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430084512).

288439830 is an abundant number, since it is smaller than the sum of its proper divisors (571729194).

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

288439830 is a wasteful number, since it uses less digits than its factorization.

288439830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 288439830 is about 16983.5164203412. The cubic root of 288439830 is about 660.7214562567.

The spelling of 288439830 in words is "two hundred eighty-eight million, four hundred thirty-nine thousand, eight hundred thirty".