7840268542 has 16 divisors (see below), whose sum is σ = 12050981712. Its totient is φ = 3823334080.

The previous prime is 7840268537. The next prime is 7840268549. The reversal of 7840268542 is 2458620487.

It is a super-2 number, since 2×7840268542² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7840268492 and 7840268501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7840268549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288513 + ... + 314515.

It is an arithmetic number, because the mean of its divisors is an integer number (753186357).

Almost surely, 2^7840268542 is an apocalyptic number.

7840268542 is a deficient number, since it is larger than the sum of its proper divisors (4210713170).

7840268542 is a wasteful number, since it uses less digits than its factorization.

7840268542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29723.

The product of its (nonzero) digits is 860160, while the sum is 46.

The square root of 7840268542 is about 88545.2909080997. The cubic root of 7840268542 is about 1986.5994584426.

The spelling of 7840268542 in words is "seven billion, eight hundred forty million, two hundred sixty-eight thousand, five hundred forty-two".