288021642 has 16 divisors (see below), whose sum is σ = 576210720. Its totient is φ = 95979312.

The previous prime is 288021631. The next prime is 288021647. The reversal of 288021642 is 246120882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (288021647) 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 7 ways as a sum of consecutive naturals, for example, 33084 + ... + 40872.

It is an arithmetic number, because the mean of its divisors is an integer number (36013170).

Almost surely, 2^288021642 is an apocalyptic number.

288021642 is an abundant number, since it is smaller than the sum of its proper divisors (288189078).

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

288021642 is a wasteful number, since it uses less digits than its factorization.

288021642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13957.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 288021642 is about 16971.2003700386. The cubic root of 288021642 is about 660.4019911029.

The spelling of 288021642 in words is "two hundred eighty-eight million, twenty-one thousand, six hundred forty-two".