28765574 has 8 divisors (see below), whose sum is σ = 43191120. Its totient is φ = 14368536.

The previous prime is 28765573. The next prime is 28765589. The reversal of 28765574 is 47556782.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28765573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4394 + ... + 8765.

It is an arithmetic number, because the mean of its divisors is an integer number (5398890).

Almost surely, 2^28765574 is an apocalyptic number.

28765574 is a deficient number, since it is larger than the sum of its proper divisors (14425546).

28765574 is a wasteful number, since it uses less digits than its factorization.

28765574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14254.

The product of its digits is 470400, while the sum is 44.

The square root of 28765574 is about 5363.3547337464. The cubic root of 28765574 is about 306.4015901473.

The spelling of 28765574 in words is "twenty-eight million, seven hundred sixty-five thousand, five hundred seventy-four".