404188149 has 4 divisors (see below), whose sum is σ = 538917536. Its totient is φ = 269458764.

The previous prime is 404188139. The next prime is 404188181. The reversal of 404188149 is 941881404.

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.

It is not a de Polignac number, because 404188149 - 2⁵ = 404188117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404188139) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 67364689 + ... + 67364694.

It is an arithmetic number, because the mean of its divisors is an integer number (134729384).

Almost surely, 2^404188149 is an apocalyptic number.

It is an amenable number.

404188149 is a deficient number, since it is larger than the sum of its proper divisors (134729387).

404188149 is a wasteful number, since it uses less digits than its factorization.

404188149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134729386.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 404188149 is about 20104.4310787448. The cubic root of 404188149 is about 739.3689220328.

The spelling of 404188149 in words is "four hundred four million, one hundred eighty-eight thousand, one hundred forty-nine".