28438086 has 16 divisors (see below), whose sum is σ = 57207024. Its totient is φ = 9424224.

The previous prime is 28438063. The next prime is 28438103. The reversal of 28438086 is 68083482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12661 + ... + 14736.

It is an arithmetic number, because the mean of its divisors is an integer number (3575439).

Almost surely, 2^28438086 is an apocalyptic number.

28438086 is an abundant number, since it is smaller than the sum of its proper divisors (28768938).

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

28438086 is a wasteful number, since it uses less digits than its factorization.

28438086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27575.

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 28438086 is about 5332.7371958498. The cubic root of 28438086 is about 305.2343840215.

The spelling of 28438086 in words is "twenty-eight million, four hundred thirty-eight thousand, eighty-six".