28858388 has 12 divisors (see below), whose sum is σ = 54387060. Its totient is φ = 13319232.

The previous prime is 28858387. The next prime is 28858411. The reversal of 28858388 is 88385882.

It can be written as a sum of positive squares in 2 ways, for example, as 4276624 + 24581764 = 2068^2 + 4958^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28858387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277433 + ... + 277536.

It is an arithmetic number, because the mean of its divisors is an integer number (4532255).

Almost surely, 2^28858388 is an apocalyptic number.

It is an amenable number.

28858388 is a deficient number, since it is larger than the sum of its proper divisors (25528672).

28858388 is a wasteful number, since it uses less digits than its factorization.

28858388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554986 (or 554984 counting only the distinct ones).

The product of its digits is 983040, while the sum is 50.

The square root of 28858388 is about 5372.0003723008. Note that the first 3 decimals coincide. The cubic root of 28858388 is about 306.7307779214.

The spelling of 28858388 in words is "twenty-eight million, eight hundred fifty-eight thousand, three hundred eighty-eight".