28867188 has 48 divisors (see below), whose sum is σ = 77261184. Its totient is φ = 8217600.

The previous prime is 28867187. The next prime is 28867211. The reversal of 28867188 is 88176882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28867187) 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, 33256 + ... + 34112.

It is an arithmetic number, because the mean of its divisors is an integer number (1609608).

Almost surely, 2^28867188 is an apocalyptic number.

28867188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28867188 is an abundant number, since it is smaller than the sum of its proper divisors (48393996).

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

28867188 is a wasteful number, since it uses less digits than its factorization.

28867188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1270 counting only the distinct ones).

The product of its digits is 344064, while the sum is 48.

The square root of 28867188 is about 5372.8193716149. The cubic root of 28867188 is about 306.7619526418.

It can be divided in two parts, 288 and 67188, that added together give a palindrome (67476).

The spelling of 28867188 in words is "twenty-eight million, eight hundred sixty-seven thousand, one hundred eighty-eight".