28216468 has 12 divisors (see below), whose sum is σ = 56432992. Its totient is φ = 12092760.

The previous prime is 28216451. The next prime is 28216477. The reversal of 28216468 is 86461282.

28216468 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503838 + ... + 503893.

Almost surely, 2^28216468 is an apocalyptic number.

28216468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28216468 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28216468 is a wasteful number, since it uses less digits than its factorization.

28216468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007742 (or 1007740 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 28216468 is about 5311.9175445408. The cubic root of 28216468 is about 304.4394182053.

The spelling of 28216468 in words is "twenty-eight million, two hundred sixteen thousand, four hundred sixty-eight".