28901648 has 10 divisors (see below), whose sum is σ = 55996974. Its totient is φ = 14450816.

The previous prime is 28901647. The next prime is 28901651. The reversal of 28901648 is 84610982.

It can be written as a sum of positive squares in only one way, i.e., 28858384 + 43264 = 5372^2 + 208^2 .

It is not an unprimeable number, because it can be changed into a prime (28901647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903161 + ... + 903192.

Almost surely, 2^28901648 is an apocalyptic number.

It is an amenable number.

28901648 is a deficient number, since it is larger than the sum of its proper divisors (27095326).

28901648 is a wasteful number, since it uses less digits than its factorization.

28901648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806361 (or 1806355 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 28901648 is about 5376.0252975595. The cubic root of 28901648 is about 306.8839690677.

The spelling of 28901648 in words is "twenty-eight million, nine hundred one thousand, six hundred forty-eight".