28436648 has 32 divisors (see below), whose sum is σ = 58916160. Its totient is φ = 12798720.

The previous prime is 28436633. The next prime is 28436659. The reversal of 28436648 is 84663482.

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, 1418 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (1841130).

Almost surely, 2^28436648 is an apocalyptic number.

It is an amenable number.

28436648 is an abundant number, since it is smaller than the sum of its proper divisors (30479512).

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

28436648 is a wasteful number, since it uses less digits than its factorization.

28436648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9137 (or 9133 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 28436648 is about 5332.6023665749. The cubic root of 28436648 is about 305.2292391084.

The spelling of 28436648 in words is "twenty-eight million, four hundred thirty-six thousand, six hundred forty-eight".