1331890252 has 48 divisors (see below), whose sum is σ = 2912716800. Its totient is φ = 517708800.

The previous prime is 1331890237. The next prime is 1331890271. The reversal of 1331890252 is 2520981331.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133477 + ... + 143107.

It is an arithmetic number, because the mean of its divisors is an integer number (60681600).

Almost surely, 2^1331890252 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 1331890252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456358400).

1331890252 is an abundant number, since it is smaller than the sum of its proper divisors (1580826548).

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

1331890252 is a wasteful number, since it uses less digits than its factorization.

1331890252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10102 (or 10100 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1331890252 is about 36495.0716124794. The cubic root of 1331890252 is about 1100.2451938262.

The spelling of 1331890252 in words is "one billion, three hundred thirty-one million, eight hundred ninety thousand, two hundred fifty-two".