1820095872 has 64 divisors (see below), whose sum is σ = 5525299200. Its totient is φ = 520026624.

The previous prime is 1820095847. The next prime is 1820095909. The reversal of 1820095872 is 2785900281.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335872 + ... + 341247.

It is an arithmetic number, because the mean of its divisors is an integer number (86332800).

Almost surely, 2^1820095872 is an apocalyptic number.

1820095872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1820095872 is an abundant number, since it is smaller than the sum of its proper divisors (3705203328).

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

1820095872 is an equidigital number, since it uses as much as digits as its factorization.

1820095872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677143 (or 677131 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 1820095872 is about 42662.5816377771. The cubic root of 1820095872 is about 1220.9505876340.

The spelling of 1820095872 in words is "one billion, eight hundred twenty million, ninety-five thousand, eight hundred seventy-two".