28001079 has 16 divisors (see below), whose sum is σ = 43667200. Its totient is φ = 17684568.

The previous prime is 28001069. The next prime is 28001081. The reversal of 28001079 is 97010082.

It is not a de Polignac number, because 28001079 - 2⁴ = 28001063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26779 + ... + 27804.

It is an arithmetic number, because the mean of its divisors is an integer number (2729200).

Almost surely, 2^28001079 is an apocalyptic number.

28001079 is a deficient number, since it is larger than the sum of its proper divisors (15666121).

28001079 is a wasteful number, since it uses less digits than its factorization.

28001079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54611 (or 54605 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 28001079 is about 5291.6045770636. The cubic root of 28001079 is about 303.6627977083.

The spelling of 28001079 in words is "twenty-eight million, one thousand, seventy-nine".