28545838 has 4 divisors (see below), whose sum is σ = 42818760. Its totient is φ = 14272918.

The previous prime is 28545827. The next prime is 28545841. The reversal of 28545838 is 83854582.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 28545794 and 28545803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7136458 + ... + 7136461.

It is an arithmetic number, because the mean of its divisors is an integer number (10704690).

Almost surely, 2^28545838 is an apocalyptic number.

28545838 is a deficient number, since it is larger than the sum of its proper divisors (14272922).

28545838 is a wasteful number, since it uses less digits than its factorization.

28545838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14272921.

The product of its digits is 307200, while the sum is 43.

The square root of 28545838 is about 5342.8305232339. The cubic root of 28545838 is about 305.6194094993.

The spelling of 28545838 in words is "twenty-eight million, five hundred forty-five thousand, eight hundred thirty-eight".