28876648 has 8 divisors (see below), whose sum is σ = 54143730. Its totient is φ = 14438320.

The previous prime is 28876621. The next prime is 28876649. The reversal of 28876648 is 84667882.

It can be written as a sum of positive squares in only one way, i.e., 25786084 + 3090564 = 5078^2 + 1758^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28876649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804783 + ... + 1804798.

Almost surely, 2^28876648 is an apocalyptic number.

It is an amenable number.

28876648 is a deficient number, since it is larger than the sum of its proper divisors (25267082).

28876648 is a wasteful number, since it uses less digits than its factorization.

28876648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609587 (or 3609583 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 28876648 is about 5373.6996566611. The cubic root of 28876648 is about 306.7954584007.

The spelling of 28876648 in words is "twenty-eight million, eight hundred seventy-six thousand, six hundred forty-eight".