185490449 has 4 divisors (see below), whose sum is σ = 185606640. Its totient is φ = 185374260.

The previous prime is 185490421. The next prime is 185490479. The reversal of 185490449 is 944094581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944094581 = 433 ⋅2180357.

It is a cyclic number.

It is not a de Polignac number, because 185490449 - 2¹⁶ = 185424913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (185490479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55667 + ... + 58904.

It is an arithmetic number, because the mean of its divisors is an integer number (46401660).

Almost surely, 2^185490449 is an apocalyptic number.

It is an amenable number.

185490449 is a deficient number, since it is larger than the sum of its proper divisors (116191).

185490449 is a wasteful number, since it uses less digits than its factorization.

185490449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116190.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 185490449 is about 13619.4878391223. The cubic root of 185490449 is about 570.3050065580.

The spelling of 185490449 in words is "one hundred eighty-five million, four hundred ninety thousand, four hundred forty-nine".