28169486 has 4 divisors (see below), whose sum is σ = 42254232. Its totient is φ = 14084742.

The previous prime is 28169473. The next prime is 28169507. The reversal of 28169486 is 68496182.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68496182 = 2 ⋅34248091.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7042370 + ... + 7042373.

It is an arithmetic number, because the mean of its divisors is an integer number (10563558).

Almost surely, 2^28169486 is an apocalyptic number.

28169486 is a deficient number, since it is larger than the sum of its proper divisors (14084746).

28169486 is a wasteful number, since it uses less digits than its factorization.

28169486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14084745.

The product of its digits is 165888, while the sum is 44.

The square root of 28169486 is about 5307.4933820025. The cubic root of 28169486 is about 304.2703547748.

The spelling of 28169486 in words is "twenty-eight million, one hundred sixty-nine thousand, four hundred eighty-six".