28983951349 has 4 divisors (see below), whose sum is σ = 29006299564. Its totient is φ = 28961603136.

The previous prime is 28983951263. The next prime is 28983951379. The reversal of 28983951349 is 94315938982.

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 16783202500 + 12200748849 = 129550^2 + 110457^2 .

It is a cyclic number.

It is not a de Polignac number, because 28983951349 - 2²⁹ = 28447080437 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 (28983951379) 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, 11172162 + ... + 11174755.

It is an arithmetic number, because the mean of its divisors is an integer number (7251574891).

Almost surely, 2^28983951349 is an apocalyptic number.

It is an amenable number.

28983951349 is a deficient number, since it is larger than the sum of its proper divisors (22348215).

28983951349 is a wasteful number, since it uses less digits than its factorization.

28983951349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22348214.

The product of its digits is 16796160, while the sum is 61.

The spelling of 28983951349 in words is "twenty-eight billion, nine hundred eighty-three million, nine hundred fifty-one thousand, three hundred forty-nine".