28961359 has 4 divisors (see below), whose sum is σ = 33098704. Its totient is φ = 24824016.

The previous prime is 28961357. The next prime is 28961381. The reversal of 28961359 is 95316982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28961359 - 2¹ = 28961357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28961357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068662 + ... + 2068675.

It is an arithmetic number, because the mean of its divisors is an integer number (8274676).

Almost surely, 2^28961359 is an apocalyptic number.

28961359 is a deficient number, since it is larger than the sum of its proper divisors (4137345).

28961359 is an equidigital number, since it uses as much as digits as its factorization.

28961359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137344.

The product of its digits is 116640, while the sum is 43.

The square root of 28961359 is about 5381.5758844413. The cubic root of 28961359 is about 307.0951651412.

The spelling of 28961359 in words is "twenty-eight million, nine hundred sixty-one thousand, three hundred fifty-nine".