28463228 has 6 divisors (see below), whose sum is σ = 49810656. Its totient is φ = 14231612.

The previous prime is 28463221. The next prime is 28463263. The reversal of 28463228 is 82236482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28463221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3557900 + ... + 3557907.

It is an arithmetic number, because the mean of its divisors is an integer number (8301776).

Almost surely, 2^28463228 is an apocalyptic number.

It is an amenable number.

28463228 is a deficient number, since it is larger than the sum of its proper divisors (21347428).

28463228 is a wasteful number, since it uses less digits than its factorization.

28463228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7115811 (or 7115809 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 28463228 is about 5335.0940010463. The cubic root of 28463228 is about 305.3243096986.

The spelling of 28463228 in words is "twenty-eight million, four hundred sixty-three thousand, two hundred twenty-eight".