28032648 has 32 divisors (see below), whose sum is σ = 80093760. Its totient is φ = 8009280.

The previous prime is 28032629. The next prime is 28032673. The reversal of 28032648 is 84623082.

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, 83263 + ... + 83598.

It is an arithmetic number, because the mean of its divisors is an integer number (2502930).

Almost surely, 2^28032648 is an apocalyptic number.

28032648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28032648 is an abundant number, since it is smaller than the sum of its proper divisors (52061112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28032648 is a wasteful number, since it uses less digits than its factorization.

28032648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166877 (or 166873 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28032648 is about 5294.5866694200. The cubic root of 28032648 is about 303.7768734374.

It can be divided in two parts, 28032 and 648, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 28032648 in words is "twenty-eight million, thirty-two thousand, six hundred forty-eight".