28597138 has 8 divisors (see below), whose sum is σ = 42933132. Its totient is φ = 14286096.

The previous prime is 28597099. The next prime is 28597139. The reversal of 28597138 is 83179582.

It can be written as a sum of positive squares in 2 ways, for example, as 28483569 + 113569 = 5337^2 + 337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28597094 and 28597103.

It is not an unprimeable number, because it can be changed into a prime (28597139) 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 3 ways as a sum of consecutive naturals, for example, 3045 + ... + 8152.

Almost surely, 2^28597138 is an apocalyptic number.

28597138 is a deficient number, since it is larger than the sum of its proper divisors (14335994).

28597138 is a wasteful number, since it uses less digits than its factorization.

28597138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12476.

The product of its digits is 120960, while the sum is 43.

The square root of 28597138 is about 5347.6291943253. The cubic root of 28597138 is about 305.8023771321.

The spelling of 28597138 in words is "twenty-eight million, five hundred ninety-seven thousand, one hundred thirty-eight".