28240886 has 8 divisors (see below), whose sum is σ = 42574800. Its totient is φ = 14049288.

The previous prime is 28240837. The next prime is 28240909. The reversal of 28240886 is 68804282.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35081 + ... + 35876.

It is an arithmetic number, because the mean of its divisors is an integer number (5321850).

Almost surely, 2^28240886 is an apocalyptic number.

28240886 is a deficient number, since it is larger than the sum of its proper divisors (14333914).

28240886 is a wasteful number, since it uses less digits than its factorization.

28240886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71158.

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 28240886 is about 5314.2154642054. The cubic root of 28240886 is about 304.5272115982.

The spelling of 28240886 in words is "twenty-eight million, two hundred forty thousand, eight hundred eighty-six".