1331349376 has 64 divisors (see below), whose sum is σ = 3105214560. Its totient is φ = 556646400.

The previous prime is 1331349277. The next prime is 1331349379. The reversal of 1331349376 is 6739431331.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331349379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18616 + ... + 54856.

Almost surely, 2^1331349376 is an apocalyptic number.

1331349376 is a gapful number since it is divisible by the number (16) 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 1331349376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552607280).

1331349376 is an abundant number, since it is smaller than the sum of its proper divisors (1773865184).

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

1331349376 is an equidigital number, since it uses as much as digits as its factorization.

1331349376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36303 (or 36291 counting only the distinct ones).

The product of its digits is 122472, while the sum is 40.

The square root of 1331349376 is about 36487.6605991669. The cubic root of 1331349376 is about 1100.0962384119.

The spelling of 1331349376 in words is "one billion, three hundred thirty-one million, three hundred forty-nine thousand, three hundred seventy-six".