28808427 has 8 divisors (see below), whose sum is σ = 40432960. Its totient is φ = 18194760.

The previous prime is 28808419. The next prime is 28808431. The reversal of 28808427 is 72480882.

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

It is not a de Polignac number, because 28808427 - 2³ = 28808419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28808407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252649 + ... + 252762.

It is an arithmetic number, because the mean of its divisors is an integer number (5054120).

Almost surely, 2^28808427 is an apocalyptic number.

28808427 is a deficient number, since it is larger than the sum of its proper divisors (11624533).

28808427 is a wasteful number, since it uses less digits than its factorization.

28808427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505433.

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

The square root of 28808427 is about 5367.3482279427. The cubic root of 28808427 is about 306.5536667530.

The spelling of 28808427 in words is "twenty-eight million, eight hundred eight thousand, four hundred twenty-seven".