28658886 has 8 divisors (see below), whose sum is σ = 57317784. Its totient is φ = 9552960.

The previous prime is 28658879. The next prime is 28658887. The reversal of 28658886 is 68885682.

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

28658886 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28658887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2388235 + ... + 2388246.

It is an arithmetic number, because the mean of its divisors is an integer number (7164723).

Almost surely, 2^28658886 is an apocalyptic number.

28658886 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.

28658886 is a wasteful number, since it uses less digits than its factorization.

28658886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776486.

The product of its digits is 1474560, while the sum is 51.

The square root of 28658886 is about 5353.3994807038. The cubic root of 28658886 is about 306.0223188471.

The spelling of 28658886 in words is "twenty-eight million, six hundred fifty-eight thousand, eight hundred eighty-six".