28240624 has 20 divisors (see below), whose sum is σ = 55083280. Its totient is φ = 14025600.

The previous prime is 28240613. The next prime is 28240627. The reversal of 28240624 is 42604282.

It is a junction number, because it is equal to n+sod(n) for n = 28240592 and 28240601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28240627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3429 + ... + 8260.

It is an arithmetic number, because the mean of its divisors is an integer number (2754164).

Almost surely, 2^28240624 is an apocalyptic number.

It is an amenable number.

28240624 is a deficient number, since it is larger than the sum of its proper divisors (26842656).

28240624 is a wasteful number, since it uses less digits than its factorization.

28240624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11848 (or 11842 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 28240624 is about 5314.1908132847. The cubic root of 28240624 is about 304.5262698622.

The spelling of 28240624 in words is "twenty-eight million, two hundred forty thousand, six hundred twenty-four".