7812378740 has 24 divisors (see below), whose sum is σ = 16409353632. Its totient is φ = 3124311840.

The previous prime is 7812378731. The next prime is 7812378767. The reversal of 7812378740 is 478732187.

It is a super-2 number, since 2×7812378740² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67175 + ... + 141905.

It is an arithmetic number, because the mean of its divisors is an integer number (683723068).

Almost surely, 2^7812378740 is an apocalyptic number.

It is an amenable number.

7812378740 is an abundant number, since it is smaller than the sum of its proper divisors (8596974892).

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

7812378740 is a wasteful number, since it uses less digits than its factorization.

7812378740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79967 (or 79965 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 7812378740 is about 88387.6616955104. The cubic root of 7812378740 is about 1984.2410488671.

The spelling of 7812378740 in words is "seven billion, eight hundred twelve million, three hundred seventy-eight thousand, seven hundred forty".