28486685 has 8 divisors (see below), whose sum is σ = 34373976. Its totient is φ = 22662720.

The previous prime is 28486663. The next prime is 28486687. The reversal of 28486685 is 58668482.

It can be written as a sum of positive squares in 4 ways, for example, as 120409 + 28366276 = 347^2 + 5326^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28486685 - 2⁸ = 28486429 is a prime.

It is a super-2 number, since 2×28486685² = 1622982444578450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28486687) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14834 + ... + 16643.

It is an arithmetic number, because the mean of its divisors is an integer number (4296747).

Almost surely, 2^28486685 is an apocalyptic number.

It is an amenable number.

28486685 is a deficient number, since it is larger than the sum of its proper divisors (5887291).

28486685 is a wasteful number, since it uses less digits than its factorization.

28486685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31663.

The product of its digits is 737280, while the sum is 47.

The square root of 28486685 is about 5337.2919163186. The cubic root of 28486685 is about 305.4081608790.

The spelling of 28486685 in words is "twenty-eight million, four hundred eighty-six thousand, six hundred eighty-five".