28538361 has 24 divisors (see below), whose sum is σ = 43709120. Its totient is φ = 17892576.

The previous prime is 28538351. The next prime is 28538381. The reversal of 28538361 is 16383582.

It is not a de Polignac number, because 28538361 - 2⁵ = 28538329 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28538311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26316 + ... + 27378.

Almost surely, 2^28538361 is an apocalyptic number.

It is an amenable number.

28538361 is a deficient number, since it is larger than the sum of its proper divisors (15170759).

28538361 is a wasteful number, since it uses less digits than its factorization.

28538361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1242 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28538361 is about 5342.1307546708. The cubic root of 28538361 is about 305.5927235791.

The spelling of 28538361 in words is "twenty-eight million, five hundred thirty-eight thousand, three hundred sixty-one".