28857494 has 16 divisors (see below), whose sum is σ = 44906400. Its totient is φ = 13891584.

The previous prime is 28857487. The next prime is 28857509. The reversal of 28857494 is 49475882.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37142 + ... + 37910.

It is an arithmetic number, because the mean of its divisors is an integer number (2806650).

Almost surely, 2^28857494 is an apocalyptic number.

28857494 is a deficient number, since it is larger than the sum of its proper divisors (16048906).

28857494 is a wasteful number, since it uses less digits than its factorization.

28857494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447.

The product of its digits is 645120, while the sum is 47.

The square root of 28857494 is about 5371.9171624291. The cubic root of 28857494 is about 306.7276104986.

The spelling of 28857494 in words is "twenty-eight million, eight hundred fifty-seven thousand, four hundred ninety-four".