28940286 has 8 divisors (see below), whose sum is σ = 57880584. Its totient is φ = 9646760.

The previous prime is 28940251. The next prime is 28940299. The reversal of 28940286 is 68204982.

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

28940286 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, 2411685 + ... + 2411696.

It is an arithmetic number, because the mean of its divisors is an integer number (7235073).

Almost surely, 2^28940286 is an apocalyptic number.

28940286 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.

28940286 is a wasteful number, since it uses less digits than its factorization.

28940286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823386.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 28940286 is about 5379.6176444056. The cubic root of 28940286 is about 307.0206637267.

The spelling of 28940286 in words is "twenty-eight million, nine hundred forty thousand, two hundred eighty-six".