1800455240 has 16 divisors (see below), whose sum is σ = 4051024380. Its totient is φ = 720182080.

The previous prime is 1800455207. The next prime is 1800455243. The reversal of 1800455240 is 425540081.

It can be written as a sum of positive squares in 2 ways, for example, as 1684117444 + 116337796 = 41038^2 + 10786^2 .

It is not an unprimeable number, because it can be changed into a prime (1800455243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22505651 + ... + 22505730.

Almost surely, 2^1800455240 is an apocalyptic number.

1800455240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1800455240 is an abundant number, since it is smaller than the sum of its proper divisors (2250569140).

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

1800455240 is a wasteful number, since it uses less digits than its factorization.

1800455240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45011392 (or 45011388 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 1800455240 is about 42431.7715868664. The cubic root of 1800455240 is about 1216.5429409015.

The spelling of 1800455240 in words is "one billion, eight hundred million, four hundred fifty-five thousand, two hundred forty".