1331660844 has 48 divisors (see below), whose sum is σ = 3460441600. Its totient is φ = 442860048.

The previous prime is 1331660833. The next prime is 1331660867. The reversal of 1331660844 is 4480661331.

It is a happy number.

1331660844 is a `hidden beast` number, since 1 + 3 + 3 + 1 + 6 + 608 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1331660799 and 1331660808.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33369 + ... + 61455.

Almost surely, 2^1331660844 is an apocalyptic number.

It is an amenable number.

1331660844 is an abundant number, since it is smaller than the sum of its proper divisors (2128780756).

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

1331660844 is a wasteful number, since it uses less digits than its factorization.

1331660844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28539 (or 28531 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1331660844 is about 36491.9284774044. The cubic root of 1331660844 is about 1100.1820205675.

The spelling of 1331660844 in words is "one billion, three hundred thirty-one million, six hundred sixty thousand, eight hundred forty-four".