28604738 has 16 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 14091216.

The previous prime is 28604729. The next prime is 28604749. The reversal of 28604738 is 83740682.

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, 74495 + ... + 74877.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^28604738 is an apocalyptic number.

28604738 is a deficient number, since it is larger than the sum of its proper divisors (14940862).

28604738 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (28604737) it forms an eRAP, since the sums of their prime factors are consecutive (840 and 841).

28604738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28604738 is about 5348.3397423874. The cubic root of 28604738 is about 305.8294648335.

The spelling of 28604738 in words is "twenty-eight million, six hundred four thousand, seven hundred thirty-eight".