8120242494 has 128 divisors (see below), whose sum is σ = 22249543680. Its totient is φ = 2137715712.

The previous prime is 8120242463. The next prime is 8120242513. The reversal of 8120242494 is 4942420218.

8120242494 is a `hidden beast` number, since 8 + 120 + 2 + 42 + 494 = 666.

It is a super-2 number, since 2×8120242494² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 3571342 + ... + 3573614.

It is an arithmetic number, because the mean of its divisors is an integer number (173824560).

Almost surely, 2^8120242494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8120242494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11124771840).

8120242494 is an abundant number, since it is smaller than the sum of its proper divisors (14129301186).

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

8120242494 is a wasteful number, since it uses less digits than its factorization.

8120242494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031 (or 3025 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 8120242494 is about 90112.3881272714. The cubic root of 8120242494 is about 2009.9704205939.

The spelling of 8120242494 in words is "eight billion, one hundred twenty million, two hundred forty-two thousand, four hundred ninety-four".