28343886 has 8 divisors (see below), whose sum is σ = 56687784. Its totient is φ = 9447960.

The previous prime is 28343873. The next prime is 28343891. The reversal of 28343886 is 68834382.

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

28343886 is an admirable number.

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, 2361985 + ... + 2361996.

It is an arithmetic number, because the mean of its divisors is an integer number (7085973).

Almost surely, 2^28343886 is an apocalyptic number.

28343886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28343886 is a wasteful number, since it uses less digits than its factorization.

28343886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723986.

The product of its digits is 221184, while the sum is 42.

The square root of 28343886 is about 5323.8976323742. The cubic root of 28343886 is about 304.8969857249.

The spelling of 28343886 in words is "twenty-eight million, three hundred forty-three thousand, eight hundred eighty-six".