28942686 has 24 divisors (see below), whose sum is σ = 63774360. Its totient is φ = 9483696.

The previous prime is 28942663. The next prime is 28942699. The reversal of 28942686 is 68624982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12565 + ... + 14688.

It is an arithmetic number, because the mean of its divisors is an integer number (2657265).

Almost surely, 2^28942686 is an apocalyptic number.

28942686 is an abundant number, since it is smaller than the sum of its proper divisors (34831674).

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

28942686 is a wasteful number, since it uses less digits than its factorization.

28942686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27320 (or 27317 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28942686 is about 5379.8407039614. The cubic root of 28942686 is about 307.0291505033.

The spelling of 28942686 in words is "twenty-eight million, nine hundred forty-two thousand, six hundred eighty-six".