28974989287 has 2 divisors, whose sum is σ = 28974989288. Its totient is φ = 28974989286.

The previous prime is 28974989279. The next prime is 28974989299. The reversal of 28974989287 is 78298947982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28974989287 - 2³ = 28974989279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28974189287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14487494643 + 14487494644.

It is an arithmetic number, because the mean of its divisors is an integer number (14487494644).

Almost surely, 2^28974989287 is an apocalyptic number.

28974989287 is a deficient number, since it is larger than the sum of its proper divisors (1).

28974989287 is an equidigital number, since it uses as much as digits as its factorization.

28974989287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 292626432, while the sum is 73.

The spelling of 28974989287 in words is "twenty-eight billion, nine hundred seventy-four million, nine hundred eighty-nine thousand, two hundred eighty-seven".