28658266 has 32 divisors (see below), whose sum is σ = 53923968. Its totient is φ = 11119680.

The previous prime is 28658263. The next prime is 28658281. The reversal of 28658266 is 66285682.

It is not an unprimeable number, because it can be changed into a prime (28658261) 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 15 ways as a sum of consecutive naturals, for example, 8161 + ... + 11131.

It is an arithmetic number, because the mean of its divisors is an integer number (1685124).

Almost surely, 2^28658266 is an apocalyptic number.

28658266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28658266 is a deficient number, since it is larger than the sum of its proper divisors (25265702).

28658266 is a wasteful number, since it uses less digits than its factorization.

28658266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046.

The product of its digits is 276480, while the sum is 43.

The square root of 28658266 is about 5353.3415732606. The cubic root of 28658266 is about 306.0201120248.

The spelling of 28658266 in words is "twenty-eight million, six hundred fifty-eight thousand, two hundred sixty-six".