2491883278 has 4 divisors (see below), whose sum is σ = 3737824920. Its totient is φ = 1245941638.

The previous prime is 2491883267. The next prime is 2491883279. The reversal of 2491883278 is 8723881942.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491883279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622970818 + ... + 622970821.

It is an arithmetic number, because the mean of its divisors is an integer number (934456230).

Almost surely, 2^2491883278 is an apocalyptic number.

2491883278 is a deficient number, since it is larger than the sum of its proper divisors (1245941642).

2491883278 is a wasteful number, since it uses less digits than its factorization.

2491883278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245941641.

The product of its digits is 1548288, while the sum is 52.

The square root of 2491883278 is about 49918.7667916586. The cubic root of 2491883278 is about 1355.7384042870.

The spelling of 2491883278 in words is "two billion, four hundred ninety-one million, eight hundred eighty-three thousand, two hundred seventy-eight".