186426138 has 16 divisors (see below), whose sum is σ = 392476320. Its totient is φ = 58871376.

The previous prime is 186426137. The next prime is 186426161. The reversal of 186426138 is 831624681.

It is a junction number, because it is equal to n+sod(n) for n = 186426096 and 186426105.

It is not an unprimeable number, because it can be changed into a prime (186426137) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 817545 + ... + 817772.

It is an arithmetic number, because the mean of its divisors is an integer number (24529770).

Almost surely, 2^186426138 is an apocalyptic number.

186426138 is an abundant number, since it is smaller than the sum of its proper divisors (206050182).

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

186426138 is a wasteful number, since it uses less digits than its factorization.

186426138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635341.

The product of its digits is 55296, while the sum is 39.

The square root of 186426138 is about 13653.7957359849. The cubic root of 186426138 is about 571.2623484794.

The spelling of 186426138 in words is "one hundred eighty-six million, four hundred twenty-six thousand, one hundred thirty-eight".