1531796868 has 36 divisors (see below), whose sum is σ = 4425191680. Its totient is φ = 437656176.

The previous prime is 1531796867. The next prime is 1531796897. The reversal of 1531796868 is 8686971351.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1531796867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3039028 + ... + 3039531.

Almost surely, 2^1531796868 is an apocalyptic number.

1531796868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1531796868 is an abundant number, since it is smaller than the sum of its proper divisors (2893394812).

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

1531796868 is a wasteful number, since it uses less digits than its factorization.

1531796868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078576 (or 6078571 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 1531796868 is about 39138.1766054577. The cubic root of 1531796868 is about 1152.7462702926.

The spelling of 1531796868 in words is "one billion, five hundred thirty-one million, seven hundred ninety-six thousand, eight hundred sixty-eight".