288978728 has 16 divisors (see below), whose sum is σ = 547924500. Its totient is φ = 142865536.

The previous prime is 288978727. The next prime is 288978743. The reversal of 288978728 is 827879882.

It can be written as a sum of positive squares in 2 ways, for example, as 276290884 + 12687844 = 16622^2 + 3562^2 .

It is not an unprimeable number, because it can be changed into a prime (288978727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202223 + ... + 203646.

Almost surely, 2^288978728 is an apocalyptic number.

It is an amenable number.

288978728 is a deficient number, since it is larger than the sum of its proper divisors (258945772).

288978728 is a wasteful number, since it uses less digits than its factorization.

288978728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405964 (or 405960 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 59.

The square root of 288978728 is about 16999.3743414280. The cubic root of 288978728 is about 661.1326800413.

The spelling of 288978728 in words is "two hundred eighty-eight million, nine hundred seventy-eight thousand, seven hundred twenty-eight".