1331287496 has 128 divisors (see below), whose sum is σ = 3206511360. Its totient is φ = 507386880.

The previous prime is 1331287483. The next prime is 1331287501. The reversal of 1331287496 is 6947821331.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3950240 + ... + 3950576.

It is an arithmetic number, because the mean of its divisors is an integer number (25050870).

Almost surely, 2^1331287496 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 1331287496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603255680).

1331287496 is an abundant number, since it is smaller than the sum of its proper divisors (1875223864).

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

1331287496 is a wasteful number, since it uses less digits than its factorization.

1331287496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 410 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 1331287496 is about 36486.8126314152. The cubic root of 1331287496 is about 1100.0791942983.

It can be divided in two parts, 1331 and 287496, that multiplied together give a cube (382657176 = 726³).

The spelling of 1331287496 in words is "one billion, three hundred thirty-one million, two hundred eighty-seven thousand, four hundred ninety-six".