186440049 has 12 divisors (see below), whose sum is σ = 279276816. Its totient is φ = 124293204.

The previous prime is 186440021. The next prime is 186440087. The reversal of 186440049 is 940044681.

It is a happy number.

186440049 is a `hidden beast` number, since 1 + 8 + 644 + 0 + 0 + 4 + 9 = 666.

It is not a de Polignac number, because 186440049 - 2¹⁵ = 186407281 is a prime.

It is a super-2 number, since 2×186440049² = 69519783742244802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 186439995 and 186440022.

It is not an unprimeable number, because it can be changed into a prime (186440099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 383379 + ... + 383864.

It is an arithmetic number, because the mean of its divisors is an integer number (23273068).

Almost surely, 2^186440049 is an apocalyptic number.

It is an amenable number.

186440049 is a deficient number, since it is larger than the sum of its proper divisors (92836767).

186440049 is an frugal number, since it uses more digits than its factorization.

186440049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767258 (or 767246 counting only the distinct ones).

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

The square root of 186440049 is about 13654.3051452646. The cubic root of 186440049 is about 571.2765572039.

The spelling of 186440049 in words is "one hundred eighty-six million, four hundred forty thousand, forty-nine".