28657078 has 8 divisors (see below), whose sum is σ = 43503768. Its totient is φ = 14155824.

The previous prime is 28657063. The next prime is 28657141. The reversal of 28657078 is 87075682.

It is a happy number.

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, 86151 + ... + 86482.

It is an arithmetic number, because the mean of its divisors is an integer number (5437971).

Almost surely, 2^28657078 is an apocalyptic number.

28657078 is a deficient number, since it is larger than the sum of its proper divisors (14846690).

28657078 is a wasteful number, since it uses less digits than its factorization.

28657078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172718.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 28657078 is about 5353.2306133773. The cubic root of 28657078 is about 306.0158833796.

The spelling of 28657078 in words is "twenty-eight million, six hundred fifty-seven thousand, seventy-eight".