9941391240 has 384 divisors, whose sum is σ = 35673644160. Its totient is φ = 2190336000.

The previous prime is 9941391233. The next prime is 9941391277. The reversal of 9941391240 is 421931499.

It is a junction number, because it is equal to n+sod(n) for n = 9941391192 and 9941391201.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21564610 + ... + 21565070.

It is an arithmetic number, because the mean of its divisors is an integer number (92900115).

Almost surely, 2^9941391240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9941391240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17836822080).

9941391240 is an abundant number, since it is smaller than the sum of its proper divisors (25732252920).

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

9941391240 is a wasteful number, since it uses less digits than its factorization.

9941391240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 9941391240 is about 99706.5255637764. The cubic root of 9941391240 is about 2150.2174822365.

It can be divided in two parts, 99413 and 91240, that added together give a triangular number (190653 = T₆₁₇).

The spelling of 9941391240 in words is "nine billion, nine hundred forty-one million, three hundred ninety-one thousand, two hundred forty".