28774717671 has 8 divisors (see below), whose sum is σ = 43847188864. Its totient is φ = 16442695800.

The previous prime is 28774717651. The next prime is 28774717679. The reversal of 28774717671 is 17671747782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28774717671 - 2⁵ = 28774717639 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 (28774717679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685112305 + ... + 685112346.

It is an arithmetic number, because the mean of its divisors is an integer number (5480898608).

Almost surely, 2^28774717671 is an apocalyptic number.

28774717671 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28774717671 is a deficient number, since it is larger than the sum of its proper divisors (15072471193).

28774717671 is a wasteful number, since it uses less digits than its factorization.

28774717671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370224661.

The product of its digits is 6453888, while the sum is 57.

The spelling of 28774717671 in words is "twenty-eight billion, seven hundred seventy-four million, seven hundred seventeen thousand, six hundred seventy-one".