28709474 has 8 divisors (see below), whose sum is σ = 44936640. Its totient is φ = 13730596.

The previous prime is 28709453. The next prime is 28709519. The reversal of 28709474 is 47490782.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312014 + ... + 312105.

It is an arithmetic number, because the mean of its divisors is an integer number (5617080).

Almost surely, 2^28709474 is an apocalyptic number.

28709474 is a deficient number, since it is larger than the sum of its proper divisors (16227166).

28709474 is a wasteful number, since it uses less digits than its factorization.

28709474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624144.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28709474 is about 5358.1222457126. The cubic root of 28709474 is about 306.2022741677.

The spelling of 28709474 in words is "twenty-eight million, seven hundred nine thousand, four hundred seventy-four".