28551905349 has 16 divisors (see below), whose sum is σ = 41828828160. Its totient is φ = 17179691760.

The previous prime is 28551905323. The next prime is 28551905353. The reversal of 28551905349 is 94350915582.

It is a happy number.

It is not a de Polignac number, because 28551905349 - 2²¹ = 28549808197 is a prime.

It is a super-2 number, since 2×28551905349² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551905449) 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, 3107677 + ... + 3116850.

It is an arithmetic number, because the mean of its divisors is an integer number (2614301760).

Almost surely, 2^28551905349 is an apocalyptic number.

It is an amenable number.

28551905349 is a deficient number, since it is larger than the sum of its proper divisors (13276922811).

28551905349 is a wasteful number, since it uses less digits than its factorization.

28551905349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224680.

The product of its (nonzero) digits is 1944000, while the sum is 51.

The spelling of 28551905349 in words is "twenty-eight billion, five hundred fifty-one million, nine hundred five thousand, three hundred forty-nine".