28641458 has 16 divisors (see below), whose sum is σ = 44478720. Its totient is φ = 13818000.

The previous prime is 28641443. The next prime is 28641461. The reversal of 28641458 is 85414682.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40508 + ... + 41208.

It is an arithmetic number, because the mean of its divisors is an integer number (2779920).

Almost surely, 2^28641458 is an apocalyptic number.

28641458 is a deficient number, since it is larger than the sum of its proper divisors (15837262).

28641458 is a wasteful number, since it uses less digits than its factorization.

28641458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393.

The product of its digits is 61440, while the sum is 38.

The square root of 28641458 is about 5351.7714824159. The cubic root of 28641458 is about 305.9602736529.

The spelling of 28641458 in words is "twenty-eight million, six hundred forty-one thousand, four hundred fifty-eight".