28014725 has 24 divisors (see below), whose sum is σ = 38066760. Its totient is φ = 20357120.

The previous prime is 28014709. The next prime is 28014733. The reversal of 28014725 is 52741082.

It can be written as a sum of positive squares in 12 ways, for example, as 630436 + 27384289 = 794^2 + 5233^2 .

It is not a de Polignac number, because 28014725 - 2⁴ = 28014709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 11189 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (1586115).

Almost surely, 2^28014725 is an apocalyptic number.

28014725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28014725 is a deficient number, since it is larger than the sum of its proper divisors (10052035).

28014725 is a wasteful number, since it uses less digits than its factorization.

28014725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329 (or 2324 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 28014725 is about 5292.8938209641. The cubic root of 28014725 is about 303.7121185408.

The spelling of 28014725 in words is "twenty-eight million, fourteen thousand, seven hundred twenty-five".