186530742 has 64 divisors (see below), whose sum is σ = 425779200. Its totient is φ = 60510240.

The previous prime is 186530717. The next prime is 186530761. The reversal of 186530742 is 247035681.

186530742 is a `hidden beast` number, since 1 + 86 + 530 + 7 + 42 = 666.

It is a super-2 number, since 2×186530742² = 69587435422141128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 186530697 and 186530706.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 404392 + ... + 404852.

It is an arithmetic number, because the mean of its divisors is an integer number (6652800).

Almost surely, 2^186530742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 186530742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212889600).

186530742 is an abundant number, since it is smaller than the sum of its proper divisors (239248458).

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

186530742 is a wasteful number, since it uses less digits than its factorization.

186530742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 186530742 is about 13657.6257819579. The cubic root of 186530742 is about 571.3691739035.

The spelling of 186530742 in words is "one hundred eighty-six million, five hundred thirty thousand, seven hundred forty-two".