28012646 has 8 divisors (see below), whose sum is σ = 42251664. Its totient is φ = 13928760.

The previous prime is 28012639. The next prime is 28012667. The reversal of 28012646 is 64621082.

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 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, 38330 + ... + 39053.

It is an arithmetic number, because the mean of its divisors is an integer number (5281458).

Almost surely, 2^28012646 is an apocalyptic number.

28012646 is a deficient number, since it is larger than the sum of its proper divisors (14239018).

28012646 is a wasteful number, since it uses less digits than its factorization.

28012646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77566.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28012646 is about 5292.6974219201. The cubic root of 28012646 is about 303.7046054310.

The spelling of 28012646 in words is "twenty-eight million, twelve thousand, six hundred forty-six".