1197863856 has 80 divisors (see below), whose sum is σ = 3929510400. Its totient is φ = 342245952.

The previous prime is 1197863837. The next prime is 1197863881. The reversal of 1197863856 is 6583687911.

It is a super-2 number, since 2×1197863856² = 2869755635022377472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 195036 + ... + 201083.

It is an arithmetic number, because the mean of its divisors is an integer number (49118880).

Almost surely, 2^1197863856 is an apocalyptic number.

1197863856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1197863856 is an abundant number, since it is smaller than the sum of its proper divisors (2731646544).

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

1197863856 is a wasteful number, since it uses less digits than its factorization.

1197863856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396143 (or 396131 counting only the distinct ones).

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

The square root of 1197863856 is about 34610.1698348910. The cubic root of 1197863856 is about 1062.0276414013.

The spelling of 1197863856 in words is "one billion, one hundred ninety-seven million, eight hundred sixty-three thousand, eight hundred fifty-six".