8420086642 has 16 divisors (see below), whose sum is σ = 13912097472. Its totient is φ = 3790152720.

The previous prime is 8420086639. The next prime is 8420086643. The reversal of 8420086642 is 2466800248.

It is a junction number, because it is equal to n+sod(n) for n = 8420086595 and 8420086604.

It is not an unprimeable number, because it can be changed into a prime (8420086643) 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, 1855653 + ... + 1860184.

It is an arithmetic number, because the mean of its divisors is an integer number (869506092).

Almost surely, 2^8420086642 is an apocalyptic number.

8420086642 is a deficient number, since it is larger than the sum of its proper divisors (5492010830).

8420086642 is a wasteful number, since it uses less digits than its factorization.

8420086642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715953.

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 8420086642 is about 91761.0300835818. The cubic root of 8420086642 is about 2034.4117404530.

The spelling of 8420086642 in words is "eight billion, four hundred twenty million, eighty-six thousand, six hundred forty-two".