28046624 has 24 divisors (see below), whose sum is σ = 56566188. Its totient is φ = 13680640.

The previous prime is 28046609. The next prime is 28046657. The reversal of 28046624 is 42664082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20539024 + 7507600 = 4532^2 + 2740^2 .

It is a super-2 number, since 2×28046624² = 1573226235594752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9377 + ... + 12000.

Almost surely, 2^28046624 is an apocalyptic number.

It is an amenable number.

28046624 is an abundant number, since it is smaller than the sum of its proper divisors (28519564).

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

28046624 is a wasteful number, since it uses less digits than its factorization.

28046624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21428 (or 21420 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 28046624 is about 5295.9063435827. The cubic root of 28046624 is about 303.8273488713.

The spelling of 28046624 in words is "twenty-eight million, forty-six thousand, six hundred twenty-four".