28641250 has 40 divisors (see below), whose sum is σ = 58593744. Its totient is φ = 10410000.

The previous prime is 28641229. The next prime is 28641251. The reversal of 28641250 is 5214682.

It is not an unprimeable number, because it can be changed into a prime (28641251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12709 + ... + 14791.

Almost surely, 2^28641250 is an apocalyptic number.

28641250 is an abundant number, since it is smaller than the sum of its proper divisors (29952494).

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

28641250 is a wasteful number, since it uses less digits than its factorization.

28641250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116 (or 2101 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28641250 is about 5351.7520495628. The cubic root of 28641250 is about 305.9595330029.

It can be divided in two parts, 2864 and 1250, that added together give a palindrome (4114).

The spelling of 28641250 in words is "twenty-eight million, six hundred forty-one thousand, two hundred fifty".