28866378 has 32 divisors (see below), whose sum is σ = 59496192. Its totient is φ = 9331200.

The previous prime is 28866371. The next prime is 28866379. The reversal of 28866378 is 87366882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28866371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66450 + ... + 66882.

It is an arithmetic number, because the mean of its divisors is an integer number (1859256).

Almost surely, 2^28866378 is an apocalyptic number.

28866378 is an abundant number, since it is smaller than the sum of its proper divisors (30629814).

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

28866378 is a wasteful number, since it uses less digits than its factorization.

28866378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its digits is 774144, while the sum is 48.

The square root of 28866378 is about 5372.7439916676. The cubic root of 28866378 is about 306.7590834152.

It can be divided in two parts, 288 and 66378, that added together give a palindrome (66666).

The spelling of 28866378 in words is "twenty-eight million, eight hundred sixty-six thousand, three hundred seventy-eight".