28857430 has 16 divisors (see below), whose sum is σ = 59364000. Its totient is φ = 9893952.

The previous prime is 28857421. The next prime is 28857443. The reversal of 28857430 is 3475882.

It is a self number, because there is not a number n which added to its sum of digits gives 28857430.

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, 206055 + ... + 206194.

It is an arithmetic number, because the mean of its divisors is an integer number (3710250).

Almost surely, 2^28857430 is an apocalyptic number.

28857430 is an abundant number, since it is smaller than the sum of its proper divisors (30506570).

28857430 is a wasteful number, since it uses less digits than its factorization.

28857430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412263.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28857430 is about 5371.9112055208. The cubic root of 28857430 is about 306.7273837455.

The spelling of 28857430 in words is "twenty-eight million, eight hundred fifty-seven thousand, four hundred thirty".