28038227 has 16 divisors (see below), whose sum is σ = 32796672. Its totient is φ = 23474880.

The previous prime is 28038211. The next prime is 28038239. The reversal of 28038227 is 72283082.

It is a cyclic number.

It is not a de Polignac number, because 28038227 - 2⁴ = 28038211 is a prime.

It is a super-2 number, since 2×28038227² = 1572284346607058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28038193 and 28038202.

It is not an unprimeable number, because it can be changed into a prime (28038247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89423 + ... + 89735.

It is an arithmetic number, because the mean of its divisors is an integer number (2049792).

Almost surely, 2^28038227 is an apocalyptic number.

28038227 is a deficient number, since it is larger than the sum of its proper divisors (4758445).

28038227 is a wasteful number, since it uses less digits than its factorization.

28038227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28038227 is about 5295.1135020885. The cubic root of 28038227 is about 303.7970244503.

The spelling of 28038227 in words is "twenty-eight million, thirty-eight thousand, two hundred twenty-seven".