28308374 has 4 divisors (see below), whose sum is σ = 42462564. Its totient is φ = 14154186.

The previous prime is 28308359. The next prime is 28308403. The reversal of 28308374 is 47380382.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7077092 + ... + 7077095.

It is an arithmetic number, because the mean of its divisors is an integer number (10615641).

Almost surely, 2^28308374 is an apocalyptic number.

28308374 is a deficient number, since it is larger than the sum of its proper divisors (14154190).

28308374 is a wasteful number, since it uses less digits than its factorization.

28308374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14154189.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28308374 is about 5320.5614365403. The cubic root of 28308374 is about 304.7695975605.

It can be divided in two parts, 28308 and 374, that added together give a palindrome (28682).

The spelling of 28308374 in words is "twenty-eight million, three hundred eight thousand, three hundred seventy-four".