1820065464 has 160 divisors (see below), whose sum is σ = 5849585280. Its totient is φ = 517928256.

The previous prime is 1820065447. The next prime is 1820065469. The reversal of 1820065464 is 4645600281.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820065469) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1391899 + ... + 1393205.

It is an arithmetic number, because the mean of its divisors is an integer number (36559908).

Almost surely, 2^1820065464 is an apocalyptic number.

1820065464 is a gapful number since it is divisible by the number (14) 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 1820065464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2924792640).

1820065464 is an abundant number, since it is smaller than the sum of its proper divisors (4029519816).

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

1820065464 is a wasteful number, since it uses less digits than its factorization.

1820065464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1820065464 is about 42662.2252584180. The cubic root of 1820065464 is about 1220.9437881987.

The spelling of 1820065464 in words is "one billion, eight hundred twenty million, sixty-five thousand, four hundred sixty-four".