28137004 has 24 divisors (see below), whose sum is σ = 58722048. Its totient is φ = 11534160.

The previous prime is 28136971. The next prime is 28137013. The reversal of 28137004 is 40073182.

It is a self number, because there is not a number n which added to its sum of digits gives 28137004.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21202 + ... + 22489.

It is an arithmetic number, because the mean of its divisors is an integer number (2446752).

Almost surely, 2^28137004 is an apocalyptic number.

It is an amenable number.

28137004 is an abundant number, since it is smaller than the sum of its proper divisors (30585044).

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

28137004 is a wasteful number, since it uses less digits than its factorization.

28137004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43725 (or 43723 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28137004 is about 5304.4324861384. The cubic root of 28137004 is about 304.1533592560.

The spelling of 28137004 in words is "twenty-eight million, one hundred thirty-seven thousand, four".