288897236 has 6 divisors (see below), whose sum is σ = 505570170. Its totient is φ = 144448616.

The previous prime is 288897211. The next prime is 288897239. The reversal of 288897236 is 632798882.

It can be written as a sum of positive squares in only one way, i.e., 237344836 + 51552400 = 15406^2 + 7180^2 .

It is a super-2 number, since 2×288897236² = 166923225936879392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288897239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36112151 + ... + 36112158.

It is an arithmetic number, because the mean of its divisors is an integer number (84261695).

Almost surely, 2^288897236 is an apocalyptic number.

It is an amenable number.

288897236 is a deficient number, since it is larger than the sum of its proper divisors (216672934).

288897236 is a wasteful number, since it uses less digits than its factorization.

288897236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72224313 (or 72224311 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 53.

The square root of 288897236 is about 16996.9772606779. The cubic root of 288897236 is about 661.0705277277.

The spelling of 288897236 in words is "two hundred eighty-eight million, eight hundred ninety-seven thousand, two hundred thirty-six".