28097685 has 160 divisors (see below), whose sum is σ = 67744512. Its totient is φ = 10782720.

The previous prime is 28097683. The next prime is 28097701. The reversal of 28097685 is 58679082.

It is not a de Polignac number, because 28097685 - 2¹ = 28097683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28097685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28097683) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 530119 + ... + 530171.

Almost surely, 2^28097685 is an apocalyptic number.

It is an amenable number.

28097685 is an abundant number, since it is smaller than the sum of its proper divisors (39646827).

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

28097685 is a wasteful number, since it uses less digits than its factorization.

28097685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28097685 is about 5300.7249504195. The cubic root of 28097685 is about 304.0116173134.

It can be divided in two parts, 28097 and 685, that added together give a palindrome (28782).

The spelling of 28097685 in words is "twenty-eight million, ninety-seven thousand, six hundred eighty-five".