28052004 has 12 divisors (see below), whose sum is σ = 65454704. Its totient is φ = 9350664.

The previous prime is 28051981. The next prime is 28052047. The reversal of 28052004 is 40025082.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1168822 + ... + 1168845.

Almost surely, 2^28052004 is an apocalyptic number.

It is an amenable number.

28052004 is an abundant number, since it is smaller than the sum of its proper divisors (37402700).

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

28052004 is a wasteful number, since it uses less digits than its factorization.

28052004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337674 (or 2337672 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 28052004 is about 5296.4142587226. The cubic root of 28052004 is about 303.8467746987.

Adding to 28052004 its reverse (40025082), we get a palindrome (68077086).

The spelling of 28052004 in words is "twenty-eight million, fifty-two thousand, four".