28119749405 has 16 divisors (see below), whose sum is σ = 37277280000. Its totient is φ = 20191853760.

The previous prime is 28119749401. The next prime is 28119749407. The reversal of 28119749405 is 50494791182.

It is a happy number.

It is not a de Polignac number, because 28119749405 - 2² = 28119749401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28119749401) 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, 3231530 + ... + 3240219.

It is an arithmetic number, because the mean of its divisors is an integer number (2329830000).

Almost surely, 2^28119749405 is an apocalyptic number.

It is an amenable number.

28119749405 is a deficient number, since it is larger than the sum of its proper divisors (9157530595).

28119749405 is a wasteful number, since it uses less digits than its factorization.

28119749405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6471844.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 28119749405 in words is "twenty-eight billion, one hundred nineteen million, seven hundred forty-nine thousand, four hundred five".