28754685 has 12 divisors (see below), whose sum is σ = 49841532. Its totient is φ = 15335808.

The previous prime is 28754683. The next prime is 28754717. The reversal of 28754685 is 58645782.

28754685 is a `hidden beast` number, since 28 + 7 + 546 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8450649 + 20304036 = 2907^2 + 4506^2 .

It is not a de Polignac number, because 28754685 - 2¹ = 28754683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 638993 = 28754685 / (2 + 8 + 7 + 5 + 4 + 6 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 28754685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28754683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319452 + ... + 319541.

It is an arithmetic number, because the mean of its divisors is an integer number (4153461).

Almost surely, 2^28754685 is an apocalyptic number.

It is an amenable number.

28754685 is a deficient number, since it is larger than the sum of its proper divisors (21086847).

28754685 is a wasteful number, since it uses less digits than its factorization.

28754685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639004 (or 639001 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 28754685 is about 5362.3395080879. The cubic root of 28754685 is about 306.3629232326.

The spelling of 28754685 in words is "twenty-eight million, seven hundred fifty-four thousand, six hundred eighty-five".