28549646 has 4 divisors (see below), whose sum is σ = 42824472. Its totient is φ = 14274822.

The previous prime is 28549637. The next prime is 28549657. The reversal of 28549646 is 64694582.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28549597 and 28549606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7137410 + ... + 7137413.

It is an arithmetic number, because the mean of its divisors is an integer number (10706118).

Almost surely, 2^28549646 is an apocalyptic number.

28549646 is a deficient number, since it is larger than the sum of its proper divisors (14274826).

28549646 is a wasteful number, since it uses less digits than its factorization.

28549646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14274825.

The product of its digits is 414720, while the sum is 44.

The square root of 28549646 is about 5343.1868767618. The cubic root of 28549646 is about 305.6329987187.

The spelling of 28549646 in words is "twenty-eight million, five hundred forty-nine thousand, six hundred forty-six".