642986246 has 8 divisors (see below), whose sum is σ = 1102262160. Its totient is φ = 275565528.

The previous prime is 642986233. The next prime is 642986249. The reversal of 642986246 is 642689246.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 642986246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642986249) 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, 22963781 + ... + 22963808.

It is an arithmetic number, because the mean of its divisors is an integer number (137782770).

Almost surely, 2^642986246 is an apocalyptic number.

642986246 is a deficient number, since it is larger than the sum of its proper divisors (459275914).

642986246 is a wasteful number, since it uses less digits than its factorization.

642986246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45927598.

The product of its digits is 995328, while the sum is 47.

The square root of 642986246 is about 25357.1734623558. The cubic root of 642986246 is about 863.1121450356.

The spelling of 642986246 in words is "six hundred forty-two million, nine hundred eighty-six thousand, two hundred forty-six".