8140786420 has 24 divisors (see below), whose sum is σ = 18410702184. Its totient is φ = 3005828736.

The previous prime is 8140786393. The next prime is 8140786441. The reversal of 8140786420 is 246870418.

It can be written as a sum of positive squares in 4 ways, for example, as 370716516 + 7770069904 = 19254^2 + 88148^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15655099 + ... + 15655618.

It is an arithmetic number, because the mean of its divisors is an integer number (767112591).

Almost surely, 2^8140786420 is an apocalyptic number.

It is an amenable number.

8140786420 is an abundant number, since it is smaller than the sum of its proper divisors (10269915764).

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

8140786420 is a wasteful number, since it uses less digits than its factorization.

8140786420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31310739 (or 31310737 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 8140786420 is about 90226.3066959964. The cubic root of 8140786420 is about 2011.6640444591.

The spelling of 8140786420 in words is "eight billion, one hundred forty million, seven hundred eighty-six thousand, four hundred twenty".