1861844448 has 24 divisors (see below), whose sum is σ = 4887341928. Its totient is φ = 620614784.

The previous prime is 1861844419. The next prime is 1861844459. The reversal of 1861844448 is 8444481681.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1861844397 and 1861844406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9697011 + ... + 9697202.

It is an arithmetic number, because the mean of its divisors is an integer number (203639247).

Almost surely, 2^1861844448 is an apocalyptic number.

It is an amenable number.

1861844448 is an abundant number, since it is smaller than the sum of its proper divisors (3025497480).

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

1861844448 is a wasteful number, since it uses less digits than its factorization.

1861844448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19394226 (or 19394218 counting only the distinct ones).

The product of its digits is 786432, while the sum is 48.

The square root of 1861844448 is about 43149.0955641019. The cubic root of 1861844448 is about 1230.2153208871.

The spelling of 1861844448 in words is "one billion, eight hundred sixty-one million, eight hundred forty-four thousand, four hundred forty-eight".