3891449744 has 80 divisors (see below), whose sum is σ = 9327403008. Its totient is φ = 1531547136.

The previous prime is 3891449707. The next prime is 3891449777. The reversal of 3891449744 is 4479441983.

It is a super-2 number, since 2×3891449744² = 30286762220155331072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280049 + ... + 293615.

Almost surely, 2^3891449744 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 3891449744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4663701504).

3891449744 is an abundant number, since it is smaller than the sum of its proper divisors (5435953264).

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

3891449744 is a wasteful number, since it uses less digits than its factorization.

3891449744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13792 (or 13786 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 53.

The square root of 3891449744 is about 62381.4855866707. The cubic root of 3891449744 is about 1572.9097652437.

The spelling of 3891449744 in words is "three billion, eight hundred ninety-one million, four hundred forty-nine thousand, seven hundred forty-four".