1810859004 has 60 divisors (see below), whose sum is σ = 4743152568. Its totient is φ = 602445600.

The previous prime is 1810858979. The next prime is 1810859033. The reversal of 1810859004 is 4009580181.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1810859004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 170119 + ... + 180449.

Almost surely, 2^1810859004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1810859004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2371576284).

1810859004 is an abundant number, since it is smaller than the sum of its proper divisors (2932293564).

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

1810859004 is a wasteful number, since it uses less digits than its factorization.

1810859004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10888 (or 10877 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 1810859004 is about 42554.1890299886. The cubic root of 1810859004 is about 1218.8816688988.

The spelling of 1810859004 in words is "one billion, eight hundred ten million, eight hundred fifty-nine thousand, four".