28693408 has 12 divisors (see below), whose sum is σ = 56490210. Its totient is φ = 14346688.

The previous prime is 28693403. The next prime is 28693409. The reversal of 28693408 is 80439682.

It can be written as a sum of positive squares in only one way, i.e., 24482704 + 4210704 = 4948^2 + 2052^2 .

It is not an unprimeable number, because it can be changed into a prime (28693403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448303 + ... + 448366.

Almost surely, 2^28693408 is an apocalyptic number.

It is an amenable number.

28693408 is a deficient number, since it is larger than the sum of its proper divisors (27796802).

28693408 is an equidigital number, since it uses as much as digits as its factorization.

28693408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896679 (or 896671 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 28693408 is about 5356.6228166635. The cubic root of 28693408 is about 306.1451459450.

The spelling of 28693408 in words is "twenty-eight million, six hundred ninety-three thousand, four hundred eight".