1804399149 has 16 divisors (see below), whose sum is σ = 2755591808. Its totient is φ = 1028823552.

The previous prime is 1804399147. The next prime is 1804399249. The reversal of 1804399149 is 9419934081.

It is not a de Polignac number, because 1804399149 - 2¹ = 1804399147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1804399098 and 1804399107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804399147) 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 15 ways as a sum of consecutive naturals, for example, 84412 + ... + 103605.

It is an arithmetic number, because the mean of its divisors is an integer number (172224488).

Almost surely, 2^1804399149 is an apocalyptic number.

It is an amenable number.

1804399149 is a deficient number, since it is larger than the sum of its proper divisors (951192659).

1804399149 is a wasteful number, since it uses less digits than its factorization.

1804399149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188484.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 1804399149 is about 42478.2197013952. The cubic root of 1804399149 is about 1217.4305748550.

The spelling of 1804399149 in words is "one billion, eight hundred four million, three hundred ninety-nine thousand, one hundred forty-nine".