28857379 has 4 divisors (see below), whose sum is σ = 28950480. Its totient is φ = 28764280.

The previous prime is 28857359. The next prime is 28857383. The reversal of 28857379 is 97375882.

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

It is a cyclic number.

It is not a de Polignac number, because 28857379 - 2¹⁵ = 28824611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28857319) by changing a digit.

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, 46084 + ... + 46705.

It is an arithmetic number, because the mean of its divisors is an integer number (7237620).

Almost surely, 2^28857379 is an apocalyptic number.

28857379 is a deficient number, since it is larger than the sum of its proper divisors (93101).

28857379 is an equidigital number, since it uses as much as digits as its factorization.

28857379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93100.

The product of its digits is 846720, while the sum is 49.

The square root of 28857379 is about 5371.9064586048. The cubic root of 28857379 is about 306.7272030514.

The spelling of 28857379 in words is "twenty-eight million, eight hundred fifty-seven thousand, three hundred seventy-nine".