28427808 has 48 divisors (see below), whose sum is σ = 79017120. Its totient is φ = 8918016.

The previous prime is 28427797. The next prime is 28427813. The reversal of 28427808 is 80872482.

It is a tau number, because it is divible by the number of its divisors (48).

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, 7078 + ... + 10341.

It is an arithmetic number, because the mean of its divisors is an integer number (1646190).

Almost surely, 2^28427808 is an apocalyptic number.

It is an amenable number.

28427808 is an abundant number, since it is smaller than the sum of its proper divisors (50589312).

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

28427808 is a wasteful number, since it uses less digits than its factorization.

28427808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17449 (or 17441 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 28427808 is about 5331.7734385474. The cubic root of 28427808 is about 305.1976073198.

The spelling of 28427808 in words is "twenty-eight million, four hundred twenty-seven thousand, eight hundred eight".