7891842840 has 64 divisors (see below), whose sum is σ = 27057749760. Its totient is φ = 1803849600.

The previous prime is 7891842839. The next prime is 7891842851. The reversal of 7891842840 is 482481987.

It is a super-2 number, since 2×7891842840² (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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4696686 + ... + 4698365.

It is an arithmetic number, because the mean of its divisors is an integer number (422777340).

Almost surely, 2^7891842840 is an apocalyptic number.

7891842840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7891842840 is an abundant number, since it is smaller than the sum of its proper divisors (19165906920).

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

7891842840 is a wasteful number, since it uses less digits than its factorization.

7891842840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9395072 (or 9395068 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The square root of 7891842840 is about 88836.0447115922. The cubic root of 7891842840 is about 1990.9459775224.

The spelling of 7891842840 in words is "seven billion, eight hundred ninety-one million, eight hundred forty-two thousand, eight hundred forty".