288138393228 has 36 divisors (see below), whose sum is σ = 782089926072. Its totient is φ = 82325255040.

The previous prime is 288138393223. The next prime is 288138393239. The reversal of 288138393228 is 822393831882.

It is not an unprimeable number, because it can be changed into a prime (288138393223) 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, 245015053 + ... + 245016228.

Almost surely, 2^288138393228 is an apocalyptic number.

288138393228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

288138393228 is an abundant number, since it is smaller than the sum of its proper divisors (493951532844).

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

288138393228 is a wasteful number, since it uses less digits than its factorization.

288138393228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490031302 (or 490031293 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 57.

The spelling of 288138393228 in words is "two hundred eighty-eight billion, one hundred thirty-eight million, three hundred ninety-three thousand, two hundred twenty-eight".