1805404029 has 32 divisors (see below), whose sum is σ = 2994413184. Its totient is φ = 950599680.

The previous prime is 1805403983. The next prime is 1805404033. The reversal of 1805404029 is 9204045081.

It is not a de Polignac number, because 1805404029 - 2⁸ = 1805403773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805404039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116484 + ... + 131069.

It is an arithmetic number, because the mean of its divisors is an integer number (93575412).

Almost surely, 2^1805404029 is an apocalyptic number.

It is an amenable number.

1805404029 is a deficient number, since it is larger than the sum of its proper divisors (1189009155).

1805404029 is a wasteful number, since it uses less digits than its factorization.

1805404029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247597.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1805404029 is about 42490.0462343829. The cubic root of 1805404029 is about 1217.6565308851.

The spelling of 1805404029 in words is "one billion, eight hundred five million, four hundred four thousand, twenty-nine".