1801940544 has 168 divisors, whose sum is σ = 5468112000. Its totient is φ = 565761024.

The previous prime is 1801940533. The next prime is 1801940557. The reversal of 1801940544 is 4450491081.

It is a super-2 number, since 2×1801940544² = 6493979448222031872, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1801940499 and 1801940508.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2505817 + ... + 2506535.

Almost surely, 2^1801940544 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 1801940544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2734056000).

1801940544 is an abundant number, since it is smaller than the sum of its proper divisors (3666171456).

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

1801940544 is a wasteful number, since it uses less digits than its factorization.

1801940544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1801940544 is about 42449.2702410772. The cubic root of 1801940544 is about 1216.8773821399.

The spelling of 1801940544 in words is "one billion, eight hundred one million, nine hundred forty thousand, five hundred forty-four".