28530685 has 8 divisors (see below), whose sum is σ = 36038880. Its totient is φ = 21623184.

The previous prime is 28530683. The next prime is 28530701. The reversal of 28530685 is 58603582.

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 28530685 - 2¹ = 28530683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530683) 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, 150067 + ... + 150256.

It is an arithmetic number, because the mean of its divisors is an integer number (4504860).

Almost surely, 2^28530685 is an apocalyptic number.

It is an amenable number.

28530685 is a deficient number, since it is larger than the sum of its proper divisors (7508195).

28530685 is a wasteful number, since it uses less digits than its factorization.

28530685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300347.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 28530685 is about 5341.4122664329. The cubic root of 28530685 is about 305.5653225651.

The spelling of 28530685 in words is "twenty-eight million, five hundred thirty thousand, six hundred eighty-five".