186904242 has 96 divisors (see below), whose sum is σ = 486001152. Its totient is φ = 50792832.

The previous prime is 186904241. The next prime is 186904247. The reversal of 186904242 is 242409681.

It is a junction number, because it is equal to n+sod(n) for n = 186904197 and 186904206.

It is not an unprimeable number, because it can be changed into a prime (186904241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218688 + ... + 219540.

It is an arithmetic number, because the mean of its divisors is an integer number (5062512).

Almost surely, 2^186904242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 186904242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243000576).

186904242 is an abundant number, since it is smaller than the sum of its proper divisors (299096910).

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

186904242 is a wasteful number, since it uses less digits than its factorization.

186904242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 186904242 is about 13671.2926235964. The cubic root of 186904242 is about 571.7502801745.

The spelling of 186904242 in words is "one hundred eighty-six million, nine hundred four thousand, two hundred forty-two".