28486224 has 60 divisors (see below), whose sum is σ = 85859956. Its totient is φ = 8764416.

The previous prime is 28486219. The next prime is 28486231. The reversal of 28486224 is 42268482.

It is a happy number.

28486224 is a `hidden beast` number, since 28 + 4 + 8 + 622 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14288400 + 14197824 = 3780^2 + 3768^2 .

It is a super-2 number, since 2×28486224² = 1622929915556352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5737 + ... + 9480.

Almost surely, 2^28486224 is an apocalyptic number.

28486224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28486224 is an abundant number, since it is smaller than the sum of its proper divisors (57373732).

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

28486224 is a wasteful number, since it uses less digits than its factorization.

28486224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15244 (or 15235 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 28486224 is about 5337.2487294485. The cubic root of 28486224 is about 305.4065133967.

The spelling of 28486224 in words is "twenty-eight million, four hundred eighty-six thousand, two hundred twenty-four".