28644622 has 16 divisors (see below), whose sum is σ = 44174592. Its totient is φ = 13923000.

The previous prime is 28644619. The next prime is 28644641. The reversal of 28644622 is 22644682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20923 + ... + 22249.

It is an arithmetic number, because the mean of its divisors is an integer number (2760912).

Almost surely, 2^28644622 is an apocalyptic number.

28644622 is a deficient number, since it is larger than the sum of its proper divisors (15529970).

28644622 is a wasteful number, since it uses less digits than its factorization.

28644622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623.

The product of its digits is 36864, while the sum is 34.

The square root of 28644622 is about 5352.0670773076. The cubic root of 28644622 is about 305.9715396374.

The spelling of 28644622 in words is "twenty-eight million, six hundred forty-four thousand, six hundred twenty-two".