28805427 has 12 divisors (see below), whose sum is σ = 47551920. Its totient is φ = 16460208.

The previous prime is 28805423. The next prime is 28805431. The reversal of 28805427 is 72450882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28805423) and next prime (28805431).

It is not a de Polignac number, because 28805427 - 2² = 28805423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28805391 and 28805400.

It is not an unprimeable number, because it can be changed into a prime (28805423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228552 + ... + 228677.

It is an arithmetic number, because the mean of its divisors is an integer number (3962660).

Almost surely, 2^28805427 is an apocalyptic number.

28805427 is a deficient number, since it is larger than the sum of its proper divisors (18746493).

28805427 is a wasteful number, since it uses less digits than its factorization.

28805427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457242 (or 457239 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28805427 is about 5367.0687530532. The cubic root of 28805427 is about 306.5430252727.

The spelling of 28805427 in words is "twenty-eight million, eight hundred five thousand, four hundred twenty-seven".