28657149 has 16 divisors (see below), whose sum is σ = 41971200. Its totient is φ = 17311536.

The previous prime is 28657141. The next prime is 28657151. The reversal of 28657149 is 94175682.

It is not a de Polignac number, because 28657149 - 2³ = 28657141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28657149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28657141) 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, 9619 + ... + 12240.

It is an arithmetic number, because the mean of its divisors is an integer number (2623200).

Almost surely, 2^28657149 is an apocalyptic number.

It is an amenable number.

28657149 is a deficient number, since it is larger than the sum of its proper divisors (13314051).

28657149 is a wasteful number, since it uses less digits than its factorization.

28657149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21904.

The product of its digits is 120960, while the sum is 42.

The square root of 28657149 is about 5353.2372448828. The cubic root of 28657149 is about 306.0161361050.

The spelling of 28657149 in words is "twenty-eight million, six hundred fifty-seven thousand, one hundred forty-nine".