28948224 has 36 divisors (see below), whose sum is σ = 77046536. Its totient is φ = 9649152.

The previous prime is 28948219. The next prime is 28948243. The reversal of 28948224 is 42284982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18079 + ... + 19614.

Almost surely, 2^28948224 is an apocalyptic number.

28948224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28948224 is an abundant number, since it is smaller than the sum of its proper divisors (48098312).

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

28948224 is an equidigital number, since it uses as much as digits as its factorization.

28948224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37712 (or 37698 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 28948224 is about 5380.3553785972. The cubic root of 28948224 is about 307.0487319501.

The spelling of 28948224 in words is "twenty-eight million, nine hundred forty-eight thousand, two hundred twenty-four".