1806814044 has 432 divisors, whose sum is σ = 6055096320. Its totient is φ = 450696960.

The previous prime is 1806814039. The next prime is 1806814049. The reversal of 1806814044 is 4404186081.

It is an interprime number because it is at equal distance from previous prime (1806814039) and next prime (1806814049).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806814049) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 38442829 + ... + 38442875.

Almost surely, 2^1806814044 is an apocalyptic number.

1806814044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806814044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3027548160).

1806814044 is an abundant number, since it is smaller than the sum of its proper divisors (4248282276).

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

1806814044 is a wasteful number, since it uses less digits than its factorization.

1806814044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 1806814044 is about 42506.6352937985. The cubic root of 1806814044 is about 1217.9734437333.

The spelling of 1806814044 in words is "one billion, eight hundred six million, eight hundred fourteen thousand, forty-four".