1813825404 has 72 divisors (see below), whose sum is σ = 4973125248. Its totient is φ = 555156480.

The previous prime is 1813825399. The next prime is 1813825411. The reversal of 1813825404 is 4045283181.

1813825404 is a `hidden beast` number, since 1 + 81 + 38 + 2 + 540 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11052 + ... + 61235.

It is an arithmetic number, because the mean of its divisors is an integer number (69071184).

Almost surely, 2^1813825404 is an apocalyptic number.

It is an amenable number.

1813825404 is an abundant number, since it is smaller than the sum of its proper divisors (3159299844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1813825404 is a wasteful number, since it uses less digits than its factorization.

1813825404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72355 (or 72350 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 1813825404 is about 42589.0291507097. The cubic root of 1813825404 is about 1219.5468629790.

The spelling of 1813825404 in words is "one billion, eight hundred thirteen million, eight hundred twenty-five thousand, four hundred four".