28325138 has 8 divisors (see below), whose sum is σ = 42554160. Its totient is φ = 14140420.

The previous prime is 28325123. The next prime is 28325153. The reversal of 28325138 is 83152382.

It is an interprime number because it is at equal distance from previous prime (28325123) and next prime (28325153).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9428 + ... + 12063.

It is an arithmetic number, because the mean of its divisors is an integer number (5319270).

Almost surely, 2^28325138 is an apocalyptic number.

28325138 is a deficient number, since it is larger than the sum of its proper divisors (14229022).

28325138 is a wasteful number, since it uses less digits than its factorization.

28325138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22152.

The product of its digits is 11520, while the sum is 32.

The square root of 28325138 is about 5322.1366010278. The cubic root of 28325138 is about 304.8297464212.

The spelling of 28325138 in words is "twenty-eight million, three hundred twenty-five thousand, one hundred thirty-eight".