3891509244 has 360 divisors, whose sum is σ = 12650114400. Its totient is φ = 1042481664.

The previous prime is 3891509233. The next prime is 3891509261. The reversal of 3891509244 is 4429051983.

3891509244 is a `hidden beast` number, since 38 + 91 + 509 + 24 + 4 = 666.

It is a super-2 number, since 2×3891509244² = 30287688392274903072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3891509244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 40118604 + ... + 40118700.

Almost surely, 2^3891509244 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 3891509244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6325057200).

3891509244 is an abundant number, since it is smaller than the sum of its proper divisors (8758605156).

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

3891509244 is a wasteful number, since it uses less digits than its factorization.

3891509244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 3891509244 is about 62381.9624891683. The cubic root of 3891509244 is about 1572.9177817637.

The spelling of 3891509244 in words is "three billion, eight hundred ninety-one million, five hundred nine thousand, two hundred forty-four".