288534981 has 24 divisors (see below), whose sum is σ = 449025024. Its totient is φ = 164324160.

The previous prime is 288534979. The next prime is 288534989. The reversal of 288534981 is 189435882.

It is not a de Polignac number, because 288534981 - 2¹ = 288534979 is a prime.

It is a super-2 number, since 2×288534981² = 166504870521340722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 288534981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288534989) 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 23 ways as a sum of consecutive naturals, for example, 42876 + ... + 49146.

It is an arithmetic number, because the mean of its divisors is an integer number (18709376).

Almost surely, 2^288534981 is an apocalyptic number.

288534981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

288534981 is a deficient number, since it is larger than the sum of its proper divisors (160490043).

288534981 is a wasteful number, since it uses less digits than its factorization.

288534981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601 (or 6594 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 288534981 is about 16986.3174643594. The cubic root of 288534981 is about 660.7941015585.

Subtracting from 288534981 its reverse (189435882), we obtain a palindrome (99099099).

The spelling of 288534981 in words is "two hundred eighty-eight million, five hundred thirty-four thousand, nine hundred eighty-one".