1188021668 has 24 divisors (see below), whose sum is σ = 2170690368. Its totient is φ = 567854496.

The previous prime is 1188021661. The next prime is 1188021677. The reversal of 1188021668 is 8661208811.

It is a super-2 number, since 2×1188021668² = 2822790967275004448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1188021661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244430 + ... + 249242.

It is an arithmetic number, because the mean of its divisors is an integer number (90445432).

Almost surely, 2^1188021668 is an apocalyptic number.

It is an amenable number.

1188021668 is a deficient number, since it is larger than the sum of its proper divisors (982668700).

1188021668 is a wasteful number, since it uses less digits than its factorization.

1188021668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7523 (or 7521 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 41.

The square root of 1188021668 is about 34467.6902040157. The cubic root of 1188021668 is about 1059.1109395812.

The spelling of 1188021668 in words is "one billion, one hundred eighty-eight million, twenty-one thousand, six hundred sixty-eight".