28725714 has 24 divisors (see below), whose sum is σ = 63170640. Its totient is φ = 9431928.

The previous prime is 28725709. The next prime is 28725721. The reversal of 28725714 is 41752782.

28725714 is a `hidden beast` number, since 2 + 87 + 2 + 571 + 4 = 666.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10704 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (2632110).

Almost surely, 2^28725714 is an apocalyptic number.

28725714 is an abundant number, since it is smaller than the sum of its proper divisors (34444926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28725714 is a wasteful number, since it uses less digits than its factorization.

28725714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23894 (or 23891 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 28725714 is about 5359.6374877411. The cubic root of 28725714 is about 306.2599994514.

The spelling of 28725714 in words is "twenty-eight million, seven hundred twenty-five thousand, seven hundred fourteen".