1805250000 has 280 divisors, whose sum is σ = 6103046880. Its totient is φ = 459200000.

The previous prime is 1805249993. The next prime is 1805250019. The reversal of 1805250000 is 525081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 21749959 + ... + 21750041.

It is an arithmetic number, because the mean of its divisors is an integer number (21796596).

Almost surely, 2^1805250000 is an apocalyptic number.

1805250000 is a gapful number since it is divisible by the number (10) 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 1805250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3051523440).

1805250000 is an abundant number, since it is smaller than the sum of its proper divisors (4297796880).

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

1805250000 is an frugal number, since it uses more digits than its factorization.

1805250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1805250000 is about 42488.2336653337. The cubic root of 1805250000 is about 1217.6219015632.

Adding to 1805250000 its reverse (525081), we get a palindrome (1805775081).

The spelling of 1805250000 in words is "one billion, eight hundred five million, two hundred fifty thousand".