9995981244 has 144 divisors (see below), whose sum is σ = 25480627200. Its totient is φ = 3041051904.

The previous prime is 9995981167. The next prime is 9995981251. The reversal of 9995981244 is 4421895999.

Its product of digits (8398080) is a multiple of the sum of its prime factors (432).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44824917 + ... + 44825139.

It is an arithmetic number, because the mean of its divisors is an integer number (176948800).

Almost surely, 2^9995981244 is an apocalyptic number.

9995981244 is a gapful number since it is divisible by the number (94) 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 9995981244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12740313600).

9995981244 is an abundant number, since it is smaller than the sum of its proper divisors (15484645956).

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

9995981244 is a wasteful number, since it uses less digits than its factorization.

9995981244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 383 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 60.

The square root of 9995981244 is about 99979.9042007943. The cubic root of 9995981244 is about 2154.1460464509.

The spelling of 9995981244 in words is "nine billion, nine hundred ninety-five million, nine hundred eighty-one thousand, two hundred forty-four".