1820485968 has 80 divisors (see below), whose sum is σ = 5489172480. Its totient is φ = 509067648.

The previous prime is 1820485967. The next prime is 1820485973. The reversal of 1820485968 is 8695840281.

It is a self number, because there is not a number n which added to its sum of digits gives 1820485968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820485967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41848 + ... + 73431.

It is an arithmetic number, because the mean of its divisors is an integer number (68614656).

Almost surely, 2^1820485968 is an apocalyptic number.

It is an amenable number.

1820485968 is an abundant number, since it is smaller than the sum of its proper divisors (3668686512).

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

1820485968 is a wasteful number, since it uses less digits than its factorization.

1820485968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115344 (or 115338 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The square root of 1820485968 is about 42667.1532680586. The cubic root of 1820485968 is about 1221.0378090316.

The spelling of 1820485968 in words is "one billion, eight hundred twenty million, four hundred eighty-five thousand, nine hundred sixty-eight".