28125655 has 8 divisors (see below), whose sum is σ = 34535952. Its totient is φ = 21977088.

The previous prime is 28125653. The next prime is 28125673. The reversal of 28125655 is 55652182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28125655 - 2¹ = 28125653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28125655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28125653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65194 + ... + 65623.

It is an arithmetic number, because the mean of its divisors is an integer number (4316994).

Almost surely, 2^28125655 is an apocalyptic number.

28125655 is a deficient number, since it is larger than the sum of its proper divisors (6410297).

28125655 is a wasteful number, since it uses less digits than its factorization.

28125655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130865.

The product of its digits is 24000, while the sum is 34.

The square root of 28125655 is about 5303.3626125318. The cubic root of 28125655 is about 304.1124605558.

The spelling of 28125655 in words is "twenty-eight million, one hundred twenty-five thousand, six hundred fifty-five".