1189542366 has 12 divisors (see below), whose sum is σ = 2577341832. Its totient is φ = 396514116.

The previous prime is 1189542353. The next prime is 1189542379. The reversal of 1189542366 is 6632459811.

It is an interprime number because it is at equal distance from previous prime (1189542353) and next prime (1189542379).

It is a super-2 number, since 2×1189542366² = 2830022081017755912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33042826 + ... + 33042861.

It is an arithmetic number, because the mean of its divisors is an integer number (214778486).

Almost surely, 2^1189542366 is an apocalyptic number.

1189542366 is an abundant number, since it is smaller than the sum of its proper divisors (1387799466).

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

1189542366 is a wasteful number, since it uses less digits than its factorization.

1189542366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66085695 (or 66085692 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1189542366 is about 34489.7429100305. The cubic root of 1189542366 is about 1059.5626432331.

The spelling of 1189542366 in words is "one billion, one hundred eighty-nine million, five hundred forty-two thousand, three hundred sixty-six".