288378728 has 16 divisors (see below), whose sum is σ = 589865760. Its totient is φ = 131081200.

The previous prime is 288378721. The next prime is 288378731. The reversal of 288378728 is 827873882.

It is a self number, because there is not a number n which added to its sum of digits gives 288378728.

It is not an unprimeable number, because it can be changed into a prime (288378721) 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, 1638428 + ... + 1638603.

It is an arithmetic number, because the mean of its divisors is an integer number (36866610).

Almost surely, 2^288378728 is an apocalyptic number.

It is an amenable number.

288378728 is an abundant number, since it is smaller than the sum of its proper divisors (301487032).

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

288378728 is a wasteful number, since it uses less digits than its factorization.

288378728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277048 (or 3277044 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 53.

The square root of 288378728 is about 16981.7174632014. The cubic root of 288378728 is about 660.6747980525.

The spelling of 288378728 in words is "two hundred eighty-eight million, three hundred seventy-eight thousand, seven hundred twenty-eight".