28957806 has 24 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 9628416.

The previous prime is 28957801. The next prime is 28957823. The reversal of 28957806 is 60875982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28957801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6291 + ... + 9873.

It is an arithmetic number, because the mean of its divisors is an integer number (2620800).

Almost surely, 2^28957806 is an apocalyptic number.

28957806 is an abundant number, since it is smaller than the sum of its proper divisors (33941394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28957806 is a wasteful number, since it uses less digits than its factorization.

28957806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040 (or 4037 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28957806 is about 5381.2457665489. The cubic root of 28957806 is about 307.0826064103.

It can be divided in two parts, 2895 and 7806, that added together give a palindrome (10701).

The spelling of 28957806 in words is "twenty-eight million, nine hundred fifty-seven thousand, eight hundred six".