3991529222340 has 192 divisors, whose sum is σ = 12380428247040. Its totient is φ = 952727592960.

The previous prime is 3991529222333. The next prime is 3991529222381. The reversal of 3991529222340 is 432229251993.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 93415501 + ... + 93458219.

It is an arithmetic number, because the mean of its divisors is an integer number (64481397120).

Almost surely, 2^{3991529222340} is an apocalyptic number.

3991529222340 is a gapful number since it is divisible by the number (30) 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 3991529222340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6190214123520).

3991529222340 is an abundant number, since it is smaller than the sum of its proper divisors (8388899024700).

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

3991529222340 is a wasteful number, since it uses less digits than its factorization.

3991529222340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44922 (or 44920 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 3991529222340 in words is "three trillion, nine hundred ninety-one billion, five hundred twenty-nine million, two hundred twenty-two thousand, three hundred forty".