28651646 has 8 divisors (see below), whose sum is σ = 43262544. Its totient is φ = 14230800.

The previous prime is 28651643. The next prime is 28651669. The reversal of 28651646 is 64615682.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28651643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47135 + ... + 47738.

It is an arithmetic number, because the mean of its divisors is an integer number (5407818).

Almost surely, 2^28651646 is an apocalyptic number.

28651646 is a deficient number, since it is larger than the sum of its proper divisors (14610898).

28651646 is a wasteful number, since it uses less digits than its factorization.

28651646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95026.

The product of its digits is 69120, while the sum is 38.

The square root of 28651646 is about 5352.7232321502. The cubic root of 28651646 is about 305.9965468732.

The spelling of 28651646 in words is "twenty-eight million, six hundred fifty-one thousand, six hundred forty-six".