1343639388 has 96 divisors (see below), whose sum is σ = 3937561600. Its totient is φ = 354352320.

The previous prime is 1343639377. The next prime is 1343639393. The reversal of 1343639388 is 8839363431.

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, 40953 + ... + 66063.

Almost surely, 2^1343639388 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 1343639388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1968780800).

1343639388 is an abundant number, since it is smaller than the sum of its proper divisors (2593922212).

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

1343639388 is a wasteful number, since it uses less digits than its factorization.

1343639388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25152 (or 25136 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 1343639388 is about 36655.6869803309. The cubic root of 1343639388 is about 1103.4709612112.

The spelling of 1343639388 in words is "one billion, three hundred forty-three million, six hundred thirty-nine thousand, three hundred eighty-eight".