28008478 has 8 divisors (see below), whose sum is σ = 42485040. Its totient is φ = 13846800.

The previous prime is 28008473. The next prime is 28008493. The reversal of 28008478 is 87480082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28008473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78498 + ... + 78853.

It is an arithmetic number, because the mean of its divisors is an integer number (5310630).

Almost surely, 2^28008478 is an apocalyptic number.

28008478 is a deficient number, since it is larger than the sum of its proper divisors (14476562).

28008478 is a wasteful number, since it uses less digits than its factorization.

28008478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157442.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28008478 is about 5292.3036571988. The cubic root of 28008478 is about 303.6895419535.

The spelling of 28008478 in words is "twenty-eight million, eight thousand, four hundred seventy-eight".