28601871 has 32 divisors (see below), whose sum is σ = 42393600. Its totient is φ = 17072640.

The previous prime is 28601869. The next prime is 28601899. The reversal of 28601871 is 17810682.

It is a happy number.

It is not a de Polignac number, because 28601871 - 2¹ = 28601869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28601861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124785 + ... + 125013.

It is an arithmetic number, because the mean of its divisors is an integer number (1324800).

Almost surely, 2^28601871 is an apocalyptic number.

28601871 is a deficient number, since it is larger than the sum of its proper divisors (13791729).

28601871 is a wasteful number, since it uses less digits than its factorization.

28601871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 28601871 is about 5348.0717085694. The cubic root of 28601871 is about 305.8192469182.

The spelling of 28601871 in words is "twenty-eight million, six hundred one thousand, eight hundred seventy-one".