1186742640 has 80 divisors (see below), whose sum is σ = 3805783200. Its totient is φ = 305550336.

The previous prime is 1186742629. The next prime is 1186742653. The reversal of 1186742640 is 462476811.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 78295 + ... + 92214.

It is an arithmetic number, because the mean of its divisors is an integer number (47572290).

Almost surely, 2^1186742640 is an apocalyptic number.

1186742640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1186742640 is an abundant number, since it is smaller than the sum of its proper divisors (2619040560).

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

1186742640 is a wasteful number, since it uses less digits than its factorization.

1186742640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170554 (or 170548 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1186742640 is about 34449.1311936891. The cubic root of 1186742640 is about 1058.7307223376.

The spelling of 1186742640 in words is "one billion, one hundred eighty-six million, seven hundred forty-two thousand, six hundred forty".