1980819464 has 64 divisors (see below), whose sum is σ = 4457980800. Its totient is φ = 815145984.

The previous prime is 1980819439. The next prime is 1980819469. The reversal of 1980819464 is 4649180891.

It is a super-2 number, since 2×1980819464² = 7847291497922494592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1980819469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4109 + ... + 63075.

It is an arithmetic number, because the mean of its divisors is an integer number (69655950).

Almost surely, 2^1980819464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980819464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2228990400).

1980819464 is an abundant number, since it is smaller than the sum of its proper divisors (2477161336).

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

1980819464 is a wasteful number, since it uses less digits than its factorization.

1980819464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59022 (or 59018 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 1980819464 is about 44506.3980119713. The cubic root of 1980819464 is about 1255.8804452311.

The spelling of 1980819464 in words is "one billion, nine hundred eighty million, eight hundred nineteen thousand, four hundred sixty-four".