28657722 has 8 divisors (see below), whose sum is σ = 57315456. Its totient is φ = 9552572.

The previous prime is 28657711. The next prime is 28657753. The reversal of 28657722 is 22775682.

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

28657722 is an admirable 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, 2388138 + ... + 2388149.

It is an arithmetic number, because the mean of its divisors is an integer number (7164432).

Almost surely, 2^28657722 is an apocalyptic number.

28657722 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.

28657722 is a wasteful number, since it uses less digits than its factorization.

28657722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776292.

The product of its digits is 94080, while the sum is 39.

The square root of 28657722 is about 5353.2907636332. The cubic root of 28657722 is about 306.0181756900.

The spelling of 28657722 in words is "twenty-eight million, six hundred fifty-seven thousand, seven hundred twenty-two".