28825623 has 24 divisors (see below), whose sum is σ = 43383600. Its totient is φ = 18420864.

The previous prime is 28825619. The next prime is 28825661. The reversal of 28825623 is 32652882.

28825623 is a `hidden beast` number, since 2 + 8 + 8 + 25 + 623 = 666.

It is not a de Polignac number, because 28825623 - 2² = 28825619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28825663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46411 + ... + 47027.

It is an arithmetic number, because the mean of its divisors is an integer number (1807650).

Almost surely, 2^28825623 is an apocalyptic number.

28825623 is a deficient number, since it is larger than the sum of its proper divisors (14557977).

28825623 is a wasteful number, since it uses less digits than its factorization.

28825623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 828 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 28825623 is about 5368.9498973263. The cubic root of 28825623 is about 306.6146494686.

The spelling of 28825623 in words is "twenty-eight million, eight hundred twenty-five thousand, six hundred twenty-three".