647286942 has 8 divisors (see below), whose sum is σ = 1294573896. Its totient is φ = 215762312.

The previous prime is 647286923. The next prime is 647286947. The reversal of 647286942 is 249682746.

It is a sphenic number, since it is the product of 3 distinct primes.

647286942 is an admirable number.

It is a super-2 number, since 2×647286942² = 837960770567422728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 647286891 and 647286900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647286947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53940573 + ... + 53940584.

It is an arithmetic number, because the mean of its divisors is an integer number (161821737).

Almost surely, 2^647286942 is an apocalyptic number.

647286942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

647286942 is a wasteful number, since it uses less digits than its factorization.

647286942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107881162.

The product of its digits is 1161216, while the sum is 48.

The square root of 647286942 is about 25441.8344857441. The cubic root of 647286942 is about 865.0322159363.

The spelling of 647286942 in words is "six hundred forty-seven million, two hundred eighty-six thousand, nine hundred forty-two".