28738872594431 has 2 divisors, whose sum is σ = 28738872594432. Its totient is φ = 28738872594430.

The previous prime is 28738872594407. The next prime is 28738872594461. The reversal of 28738872594431 is 13449527883782.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28738872594431 is a prime.

It is a super-2 number, since 2×28738872594431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28738872594461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14369436297215 + 14369436297216.

It is an arithmetic number, because the mean of its divisors is an integer number (14369436297216).

Almost surely, 2^{28738872594431} is an apocalyptic number.

28738872594431 is a deficient number, since it is larger than the sum of its proper divisors (1).

28738872594431 is an equidigital number, since it uses as much as digits as its factorization.

28738872594431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 650280960, while the sum is 71.

The spelling of 28738872594431 in words is "twenty-eight trillion, seven hundred thirty-eight billion, eight hundred seventy-two million, five hundred ninety-four thousand, four hundred thirty-one".