28265624 has 8 divisors (see below), whose sum is σ = 52998060. Its totient is φ = 14132808.

The previous prime is 28265621. The next prime is 28265639. The reversal of 28265624 is 42656282.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28265621) by changing a digit.

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 as a sum of consecutive naturals, namely, 1766594 + ... + 1766609.

Almost surely, 2^28265624 is an apocalyptic number.

It is an amenable number.

28265624 is a deficient number, since it is larger than the sum of its proper divisors (24732436).

28265624 is a wasteful number, since it uses less digits than its factorization.

28265624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533209 (or 3533205 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 28265624 is about 5316.5424854881. The cubic root of 28265624 is about 304.6161039411.

The spelling of 28265624 in words is "twenty-eight million, two hundred sixty-five thousand, six hundred twenty-four".