28208418 has 24 divisors (see below), whose sum is σ = 65628432. Its totient is φ = 8059464.

The previous prime is 28208381. The next prime is 28208429. The reversal of 28208418 is 81480282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47680 + ... + 48267.

It is an arithmetic number, because the mean of its divisors is an integer number (2734518).

Almost surely, 2^28208418 is an apocalyptic number.

28208418 is an abundant number, since it is smaller than the sum of its proper divisors (37420014).

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

28208418 is a wasteful number, since it uses less digits than its factorization.

28208418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95966 (or 95959 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 28208418 is about 5311.1597603537. The cubic root of 28208418 is about 304.4104638323.

The spelling of 28208418 in words is "twenty-eight million, two hundred eight thousand, four hundred eighteen".