28093238 has 4 divisors (see below), whose sum is σ = 42139860. Its totient is φ = 14046618.

The previous prime is 28093211. The next prime is 28093243. The reversal of 28093238 is 83239082.

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 = 28093198 and 28093207.

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, 7023308 + ... + 7023311.

It is an arithmetic number, because the mean of its divisors is an integer number (10534965).

Almost surely, 2^28093238 is an apocalyptic number.

28093238 is a deficient number, since it is larger than the sum of its proper divisors (14046622).

28093238 is a wasteful number, since it uses less digits than its factorization.

28093238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14046621.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 28093238 is about 5300.3054628955. The cubic root of 28093238 is about 303.9955779020.

The spelling of 28093238 in words is "twenty-eight million, ninety-three thousand, two hundred thirty-eight".