23898377281 has 3 divisors (see below), whose sum is σ = 23898531873. Its totient is φ = 23898222690.

The previous prime is 23898377227. The next prime is 23898377323. The reversal of 23898377281 is 18277389832.

The square root of 23898377281 is 154591.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 23898377281 - 2¹¹ = 23898375233 is a prime.

It is a super-2 number, since 2×23898377281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23898377381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 77296 + ... + 231886.

It is an arithmetic number, because the mean of its divisors is an integer number (7966177291).

Almost surely, 2^23898377281 is an apocalyptic number.

23898377281 is the 154591-st square number.

23898377281 is the 77296-th centered octagonal number.

It is an amenable number.

23898377281 is a deficient number, since it is larger than the sum of its proper divisors (154592).

23898377281 is an frugal number, since it uses more digits than its factorization.

23898377281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309182 (or 154591 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 58.

The spelling of 23898377281 in words is "twenty-three billion, eight hundred ninety-eight million, three hundred seventy-seven thousand, two hundred eighty-one".