3447391388 has 96 divisors (see below), whose sum is σ = 7427427840. Its totient is φ = 1367366400.

The previous prime is 3447391361. The next prime is 3447391411. The reversal of 3447391388 is 8831937443.

3447391388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4459370 + ... + 4460142.

It is an arithmetic number, because the mean of its divisors is an integer number (77369040).

Almost surely, 2^3447391388 is an apocalyptic number.

3447391388 is a gapful number since it is divisible by the number (38) 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 3447391388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3713713920).

3447391388 is an abundant number, since it is smaller than the sum of its proper divisors (3980036452).

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

3447391388 is a wasteful number, since it uses less digits than its factorization.

3447391388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 3447391388 is about 58714.4904431606. The cubic root of 3447391388 is about 1510.6488721895.

The spelling of 3447391388 in words is "three billion, four hundred forty-seven million, three hundred ninety-one thousand, three hundred eighty-eight".