28413228 has 24 divisors (see below), whose sum is σ = 66467520. Its totient is φ = 9446800.

The previous prime is 28413223. The next prime is 28413233. The reversal of 28413228 is 82231482.

It is an interprime number because it is at equal distance from previous prime (28413223) and next prime (28413233).

It is a junction number, because it is equal to n+sod(n) for n = 28413195 and 28413204.

It is not an unprimeable number, because it can be changed into a prime (28413221) 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, 2203 + ... + 7853.

It is an arithmetic number, because the mean of its divisors is an integer number (2769480).

Almost surely, 2^28413228 is an apocalyptic number.

It is an amenable number.

28413228 is an abundant number, since it is smaller than the sum of its proper divisors (38054292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28413228 is a wasteful number, since it uses less digits than its factorization.

28413228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6077 (or 6075 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 28413228 is about 5330.4059882902. The cubic root of 28413228 is about 305.1454220081.

The spelling of 28413228 in words is "twenty-eight million, four hundred thirteen thousand, two hundred twenty-eight".