288838781 has 12 divisors (see below), whose sum is σ = 366541920. Its totient is φ = 225068760.

The previous prime is 288838763. The next prime is 288838787. The reversal of 288838781 is 187838882.

It is a happy number.

It is not a de Polignac number, because 288838781 - 2⁶ = 288838717 is a prime.

It is a super-2 number, since 2×288838781² = 166855682819131922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288838787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267401 + ... + 268478.

It is an arithmetic number, because the mean of its divisors is an integer number (30545160).

Almost surely, 2^288838781 is an apocalyptic number.

It is an amenable number.

288838781 is a deficient number, since it is larger than the sum of its proper divisors (77703139).

288838781 is a wasteful number, since it uses less digits than its factorization.

288838781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535904 (or 535897 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 53.

The square root of 288838781 is about 16995.2576032257. The cubic root of 288838781 is about 661.0259380726.

The spelling of 288838781 in words is "two hundred eighty-eight million, eight hundred thirty-eight thousand, seven hundred eighty-one".