28963649 has 12 divisors (see below), whose sum is σ = 34286868. Its totient is φ = 24303840.

The previous prime is 28963603. The next prime is 28963651. The reversal of 28963649 is 94636982.

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 23107249 = 2420^2 + 4807^2 .

It is not a de Polignac number, because 28963649 - 2²⁰ = 27915073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28963679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7634 + ... + 10779.

It is an arithmetic number, because the mean of its divisors is an integer number (2857239).

Almost surely, 2^28963649 is an apocalyptic number.

It is an amenable number.

28963649 is a deficient number, since it is larger than the sum of its proper divisors (5323219).

28963649 is a wasteful number, since it uses less digits than its factorization.

28963649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18448 (or 18437 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The square root of 28963649 is about 5381.7886431929. The cubic root of 28963649 is about 307.1032590224.

The spelling of 28963649 in words is "twenty-eight million, nine hundred sixty-three thousand, six hundred forty-nine".