23898405888 has 220 divisors, whose sum is σ = 81562338352. Its totient is φ = 6827950080.

The previous prime is 23898405871. The next prime is 23898405899. The reversal of 23898405888 is 88850489832.

23898405888 is a `hidden beast` number, since 2 + 3 + 8 + 9 + 8 + 40 + 588 + 8 = 666.

It is a super-2 number, since 2×23898405888² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 560028 + ... + 601188.

Almost surely, 2^23898405888 is an apocalyptic number.

23898405888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23898405888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40781169176).

23898405888 is an abundant number, since it is smaller than the sum of its proper divisors (57663932464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23898405888 is an equidigital number, since it uses as much as digits as its factorization.

23898405888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41200 (or 41173 counting only the distinct ones).

The product of its (nonzero) digits is 35389440, while the sum is 63.

The spelling of 23898405888 in words is "twenty-three billion, eight hundred ninety-eight million, four hundred five thousand, eight hundred eighty-eight".