1187809968 has 20 divisors (see below), whose sum is σ = 3068509208. Its totient is φ = 395936640.

The previous prime is 1187809967. The next prime is 1187809979. The reversal of 1187809968 is 8699087811.

It is a super-2 number, since 2×1187809968² = 2821785040160322048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1187809967) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12372973 + ... + 12373068.

Almost surely, 2^1187809968 is an apocalyptic number.

It is an amenable number.

1187809968 is an abundant number, since it is smaller than the sum of its proper divisors (1880699240).

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

1187809968 is a wasteful number, since it uses less digits than its factorization.

1187809968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24746052 (or 24746046 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 57.

The square root of 1187809968 is about 34464.6190752197. The cubic root of 1187809968 is about 1059.0480262772.

The spelling of 1187809968 in words is "one billion, one hundred eighty-seven million, eight hundred nine thousand, nine hundred sixty-eight".