28241004 has 24 divisors (see below), whose sum is σ = 71886528. Its totient is φ = 8557840.

The previous prime is 28240991. The next prime is 28241021. The reversal of 28241004 is 40014282.

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, 106842 + ... + 107105.

It is an arithmetic number, because the mean of its divisors is an integer number (2995272).

Almost surely, 2^28241004 is an apocalyptic number.

It is an amenable number.

28241004 is an abundant number, since it is smaller than the sum of its proper divisors (43645524).

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

28241004 is a wasteful number, since it uses less digits than its factorization.

28241004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213965 (or 213963 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 28241004 is about 5314.2265664911. The cubic root of 28241004 is about 304.5276357369.

Adding to 28241004 its reverse (40014282), we get a palindrome (68255286).

It can be divided in two parts, 2824 and 1004, that added together give a triangular number (3828 = T₈₇).

The spelling of 28241004 in words is "twenty-eight million, two hundred forty-one thousand, four".