2081978240 has 32 divisors (see below), whose sum is σ = 4977230760. Its totient is φ = 832791040.

The previous prime is 2081978231. The next prime is 2081978263. The reversal of 2081978240 is 428791802.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625906 + ... + 1627185.

Almost surely, 2^2081978240 is an apocalyptic number.

2081978240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2081978240 is an abundant number, since it is smaller than the sum of its proper divisors (2895252520).

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

2081978240 is an equidigital number, since it uses as much as digits as its factorization.

2081978240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253110 (or 3253098 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 2081978240 is about 45628.6997404046. The cubic root of 2081978240 is about 1276.9054150480.

The spelling of 2081978240 in words is "two billion, eighty-one million, nine hundred seventy-eight thousand, two hundred forty".