28421208 has 24 divisors (see below), whose sum is σ = 76974300. Its totient is φ = 9473712.

The previous prime is 28421167. The next prime is 28421209. The reversal of 28421208 is 80212482.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28421209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197298 + ... + 197441.

Almost surely, 2^28421208 is an apocalyptic number.

It is an amenable number.

28421208 is an abundant number, since it is smaller than the sum of its proper divisors (48553092).

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

28421208 is a wasteful number, since it uses less digits than its factorization.

28421208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394751 (or 394744 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28421208 is about 5331.1544715943. The cubic root of 28421208 is about 305.1739865501.

The spelling of 28421208 in words is "twenty-eight million, four hundred twenty-one thousand, two hundred eight".