28341913 has 4 divisors (see below), whose sum is σ = 28622628. Its totient is φ = 28061200.

The previous prime is 28341899. The next prime is 28341931. The reversal of 28341913 is 31914382.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11923209 + 16418704 = 3453^2 + 4052^2 .

It is a cyclic number.

It is not a de Polignac number, because 28341913 - 2²¹ = 26244761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28341953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140206 + ... + 140407.

It is an arithmetic number, because the mean of its divisors is an integer number (7155657).

Almost surely, 2^28341913 is an apocalyptic number.

It is an amenable number.

28341913 is a deficient number, since it is larger than the sum of its proper divisors (280715).

28341913 is a wasteful number, since it uses less digits than its factorization.

28341913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280714.

The product of its digits is 5184, while the sum is 31.

The square root of 28341913 is about 5323.7123325740. The cubic root of 28341913 is about 304.8899109985.

The spelling of 28341913 in words is "twenty-eight million, three hundred forty-one thousand, nine hundred thirteen".