7840439812 has 12 divisors (see below), whose sum is σ = 13775435856. Its totient is φ = 3904601000.

The previous prime is 7840439779. The next prime is 7840439821. The reversal of 7840439812 is 2189340487.

It is a super-2 number, since 2×7840439812² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3903598 + ... + 3905605.

It is an arithmetic number, because the mean of its divisors is an integer number (1147952988).

Almost surely, 2^7840439812 is an apocalyptic number.

It is an amenable number.

7840439812 is a deficient number, since it is larger than the sum of its proper divisors (5934996044).

7840439812 is a wasteful number, since it uses less digits than its factorization.

7840439812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7809458 (or 7809456 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 7840439812 is about 88546.2580349955. The cubic root of 7840439812 is about 1986.6139240361.

The spelling of 7840439812 in words is "seven billion, eight hundred forty million, four hundred thirty-nine thousand, eight hundred twelve".