28554685 has 4 divisors (see below), whose sum is σ = 34265628. Its totient is φ = 22843744.

The previous prime is 28554683. The next prime is 28554703. The reversal of 28554685 is 58645582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58645582 = 2 ⋅29322791.

It can be written as a sum of positive squares in 2 ways, for example, as 16016004 + 12538681 = 4002^2 + 3541^2 .

It is a cyclic number.

It is not a de Polignac number, because 28554685 - 2¹ = 28554683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28554683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2855464 + ... + 2855473.

It is an arithmetic number, because the mean of its divisors is an integer number (8566407).

Almost surely, 2^28554685 is an apocalyptic number.

It is an amenable number.

28554685 is a deficient number, since it is larger than the sum of its proper divisors (5710943).

28554685 is an equidigital number, since it uses as much as digits as its factorization.

28554685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710942.

The product of its digits is 384000, while the sum is 43.

The square root of 28554685 is about 5343.6583910276. The cubic root of 28554685 is about 305.6509790243.

The spelling of 28554685 in words is "twenty-eight million, five hundred fifty-four thousand, six hundred eighty-five".