1825907220 has 144 divisors (see below), whose sum is σ = 5929560000. Its totient is φ = 453413376.

The previous prime is 1825907203. The next prime is 1825907231. The reversal of 1825907220 is 227095281.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197256 + ... + 206304.

It is an arithmetic number, because the mean of its divisors is an integer number (41177500).

Almost surely, 2^1825907220 is an apocalyptic number.

1825907220 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 1825907220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2964780000).

1825907220 is an abundant number, since it is smaller than the sum of its proper divisors (4103652780).

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

1825907220 is a wasteful number, since it uses less digits than its factorization.

1825907220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9142 (or 9137 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1825907220 is about 42730.6356142756. The cubic root of 1825907220 is about 1222.2486567224.

The spelling of 1825907220 in words is "one billion, eight hundred twenty-five million, nine hundred seven thousand, two hundred twenty".