2191780488 has 32 divisors (see below), whose sum is σ = 5801772960. Its totient is φ = 687617280.

The previous prime is 2191780463. The next prime is 2191780517. The reversal of 2191780488 is 8840871912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2685598 + ... + 2686413.

It is an arithmetic number, because the mean of its divisors is an integer number (181305405).

Almost surely, 2^2191780488 is an apocalyptic number.

It is an amenable number.

2191780488 is an abundant number, since it is smaller than the sum of its proper divisors (3609992472).

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

2191780488 is a wasteful number, since it uses less digits than its factorization.

2191780488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372037 (or 5372033 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The square root of 2191780488 is about 46816.4553122083. The cubic root of 2191780488 is about 1298.9696941077.

The spelling of 2191780488 in words is "two billion, one hundred ninety-one million, seven hundred eighty thousand, four hundred eighty-eight".