28597872 has 40 divisors (see below), whose sum is σ = 76264960. Its totient is φ = 9224640.

The previous prime is 28597867. The next prime is 28597873. The reversal of 28597872 is 27879582.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28597873) 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 7 ways as a sum of consecutive naturals, for example, 8122 + ... + 11097.

It is an arithmetic number, because the mean of its divisors is an integer number (1906624).

Almost surely, 2^28597872 is an apocalyptic number.

It is an amenable number.

28597872 is an abundant number, since it is smaller than the sum of its proper divisors (47667088).

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

28597872 is a wasteful number, since it uses less digits than its factorization.

28597872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19261 (or 19255 counting only the distinct ones).

The product of its digits is 564480, while the sum is 48.

The square root of 28597872 is about 5347.6978224279. The cubic root of 28597872 is about 305.8049934431.

It can be divided in two parts, 2859 and 7872, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 28597872 in words is "twenty-eight million, five hundred ninety-seven thousand, eight hundred seventy-two".