28878468 has 12 divisors (see below), whose sum is σ = 67383120. Its totient is φ = 9626152.

The previous prime is 28878467. The next prime is 28878497. The reversal of 28878468 is 86487882.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28878468.

It is not an unprimeable number, because it can be changed into a prime (28878467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203258 + ... + 1203281.

It is an arithmetic number, because the mean of its divisors is an integer number (5615260).

Almost surely, 2^28878468 is an apocalyptic number.

It is an amenable number.

28878468 is an abundant number, since it is smaller than the sum of its proper divisors (38504652).

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

28878468 is a wasteful number, since it uses less digits than its factorization.

28878468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406546 (or 2406544 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 51.

The square root of 28878468 is about 5373.8689972868. The cubic root of 28878468 is about 306.8019037010.

The spelling of 28878468 in words is "twenty-eight million, eight hundred seventy-eight thousand, four hundred sixty-eight".