28857274 has 8 divisors (see below), whose sum is σ = 43807680. Its totient is φ = 14254716.

The previous prime is 28857247. The next prime is 28857287. The reversal of 28857274 is 47275882.

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

It is a super-2 number, since 2×28857274² = 1665484525422152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28857274.

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, 86754 + ... + 87085.

It is an arithmetic number, because the mean of its divisors is an integer number (5475960).

Almost surely, 2^28857274 is an apocalyptic number.

28857274 is a deficient number, since it is larger than the sum of its proper divisors (14950406).

28857274 is a wasteful number, since it uses less digits than its factorization.

28857274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173924.

The product of its digits is 250880, while the sum is 43.

The square root of 28857274 is about 5371.8966855292. The cubic root of 28857274 is about 306.7268310333.

The spelling of 28857274 in words is "twenty-eight million, eight hundred fifty-seven thousand, two hundred seventy-four".