28857338 has 16 divisors (see below), whose sum is σ = 44115840. Its totient is φ = 14154336.

The previous prime is 28857337. The next prime is 28857359. The reversal of 28857338 is 83375882.

It is not an unprimeable number, because it can be changed into a prime (28857337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34481 + ... + 35307.

It is an arithmetic number, because the mean of its divisors is an integer number (2757240).

Almost surely, 2^28857338 is an apocalyptic number.

28857338 is a deficient number, since it is larger than the sum of its proper divisors (15258502).

28857338 is a wasteful number, since it uses less digits than its factorization.

28857338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141.

The product of its digits is 322560, while the sum is 44.

The square root of 28857338 is about 5371.9026424536. The cubic root of 28857338 is about 306.7270577873.

The spelling of 28857338 in words is "twenty-eight million, eight hundred fifty-seven thousand, three hundred thirty-eight".