28638335 has 16 divisors (see below), whose sum is σ = 39121920. Its totient is φ = 19921440.

The previous prime is 28638317. The next prime is 28638359. The reversal of 28638335 is 53383682.

It is a de Polignac number, because none of the positive numbers 2^k-28638335 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10055 + ... + 12584.

It is an arithmetic number, because the mean of its divisors is an integer number (2445120).

Almost surely, 2^28638335 is an apocalyptic number.

28638335 is a deficient number, since it is larger than the sum of its proper divisors (10483585).

28638335 is a wasteful number, since it uses less digits than its factorization.

28638335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22678.

The product of its digits is 103680, while the sum is 38.

The square root of 28638335 is about 5351.4797019142. The cubic root of 28638335 is about 305.9491528426.

The spelling of 28638335 in words is "twenty-eight million, six hundred thirty-eight thousand, three hundred thirty-five".