2491842780 has 144 divisors (see below), whose sum is σ = 9093127680. Its totient is φ = 539581824.

The previous prime is 2491842751. The next prime is 2491842791. The reversal of 2491842780 is 872481942.

2491842780 is a `hidden beast` number, since 2 + 491 + 84 + 2 + 7 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28104 + ... + 75983.

It is an arithmetic number, because the mean of its divisors is an integer number (63146720).

Almost surely, 2^2491842780 is an apocalyptic number.

2491842780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2491842780 is an abundant number, since it is smaller than the sum of its proper divisors (6601284900).

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

2491842780 is a wasteful number, since it uses less digits than its factorization.

2491842780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104128 (or 104123 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 2491842780 is about 49918.3611509833. The cubic root of 2491842780 is about 1355.7310597762.

The spelling of 2491842780 in words is "two billion, four hundred ninety-one million, eight hundred forty-two thousand, seven hundred eighty".