28820271 has 8 divisors (see below), whose sum is σ = 38524464. Its totient is φ = 19164800.

The previous prime is 28820269. The next prime is 28820291. The reversal of 28820271 is 17202882.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28820271 - 2¹ = 28820269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28820221) 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, 10776 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (4815558).

Almost surely, 2^28820271 is an apocalyptic number.

28820271 is a deficient number, since it is larger than the sum of its proper divisors (9704193).

28820271 is a wasteful number, since it uses less digits than its factorization.

28820271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24361.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 28820271 is about 5368.4514527003. The cubic root of 28820271 is about 306.5956721028.

The spelling of 28820271 in words is "twenty-eight million, eight hundred twenty thousand, two hundred seventy-one".