28601857 has 4 divisors (see below), whose sum is σ = 29845440. Its totient is φ = 27358276.

The previous prime is 28601819. The next prime is 28601861. The reversal of 28601857 is 75810682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28601857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28601257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621757 + ... + 621802.

It is an arithmetic number, because the mean of its divisors is an integer number (7461360).

Almost surely, 2^28601857 is an apocalyptic number.

It is an amenable number.

28601857 is a deficient number, since it is larger than the sum of its proper divisors (1243583).

28601857 is a wasteful number, since it uses less digits than its factorization.

28601857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243582.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 28601857 is about 5348.0703996862. The cubic root of 28601857 is about 305.8191970209.

The spelling of 28601857 in words is "twenty-eight million, six hundred one thousand, eight hundred fifty-seven".