28917338905 has 32 divisors (see below), whose sum is σ = 42750489600. Its totient is φ = 18285806592.

The previous prime is 28917338903. The next prime is 28917338941. The reversal of 28917338905 is 50983371982.

It is a cyclic number.

It is not a de Polignac number, because 28917338905 - 2¹ = 28917338903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28917338903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 442161 + ... + 503329.

It is an arithmetic number, because the mean of its divisors is an integer number (1335952800).

Almost surely, 2^28917338905 is an apocalyptic number.

It is an amenable number.

28917338905 is a deficient number, since it is larger than the sum of its proper divisors (13833150695).

28917338905 is a wasteful number, since it uses less digits than its factorization.

28917338905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62233.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 28917338905 in words is "twenty-eight billion, nine hundred seventeen million, three hundred thirty-eight thousand, nine hundred five".