1804890256 has 135 divisors (see below), whose sum is σ = 4091554809. Its totient is φ = 770829696.

The previous prime is 1804890239. The next prime is 1804890271. The reversal of 1804890256 is 6520984081.

It is a happy number.

The square root of 1804890256 is 42484.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 266995600 + 1537894656 = 16340^2 + 39216^2 .

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 41974171 + ... + 41974213.

Almost surely, 2^1804890256 is an apocalyptic number.

1804890256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1804890256 is the 42484-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1804890256

1804890256 is an abundant number, since it is smaller than the sum of its proper divisors (2286664553).

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

1804890256 is a wasteful number, since it uses less digits than its factorization.

1804890256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The cubic root of 1804890256 is about 1217.5410150243.

The spelling of 1804890256 in words is "one billion, eight hundred four million, eight hundred ninety thousand, two hundred fifty-six".