28725895 has 8 divisors (see below), whose sum is σ = 37604880. Its totient is φ = 20891520.

The previous prime is 28725881. The next prime is 28725899. The reversal of 28725895 is 59852782.

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

It is not a de Polignac number, because 28725895 - 2¹⁷ = 28594823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28725899) 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 in 7 ways as a sum of consecutive naturals, for example, 261090 + ... + 261199.

It is an arithmetic number, because the mean of its divisors is an integer number (4700610).

Almost surely, 2^28725895 is an apocalyptic number.

28725895 is a deficient number, since it is larger than the sum of its proper divisors (8878985).

28725895 is a wasteful number, since it uses less digits than its factorization.

28725895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522305.

The product of its digits is 403200, while the sum is 46.

The square root of 28725895 is about 5359.6543731849. The cubic root of 28725895 is about 306.2606426955.

The spelling of 28725895 in words is "twenty-eight million, seven hundred twenty-five thousand, eight hundred ninety-five".