28875838 has 4 divisors (see below), whose sum is σ = 43313760. Its totient is φ = 14437918.

The previous prime is 28875829. The next prime is 28875853. The reversal of 28875838 is 83857882.

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 = 28875791 and 28875800.

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, 7218958 + ... + 7218961.

It is an arithmetic number, because the mean of its divisors is an integer number (10828440).

Almost surely, 2^28875838 is an apocalyptic number.

28875838 is a deficient number, since it is larger than the sum of its proper divisors (14437922).

28875838 is a wasteful number, since it uses less digits than its factorization.

28875838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14437921.

The product of its digits is 860160, while the sum is 49.

The square root of 28875838 is about 5373.6242890623. The cubic root of 28875838 is about 306.7925898009.

The spelling of 28875838 in words is "twenty-eight million, eight hundred seventy-five thousand, eight hundred thirty-eight".