1845641244 has 48 divisors (see below), whose sum is σ = 4583543328. Its totient is φ = 576012288.

The previous prime is 1845641243. The next prime is 1845641249. The reversal of 1845641244 is 4421465481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845641243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15934 + ... + 62810.

It is an arithmetic number, because the mean of its divisors is an integer number (95490486).

Almost surely, 2^1845641244 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 1845641244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2291771664).

1845641244 is an abundant number, since it is smaller than the sum of its proper divisors (2737902084).

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

1845641244 is a wasteful number, since it uses less digits than its factorization.

1845641244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47094 (or 47092 counting only the distinct ones).

The product of its digits is 122880, while the sum is 39.

The square root of 1845641244 is about 42960.9269453069. The cubic root of 1845641244 is about 1226.6361575128.

The spelling of 1845641244 in words is "one billion, eight hundred forty-five million, six hundred forty-one thousand, two hundred forty-four".