642868246 has 8 divisors (see below), whose sum is σ = 966283920. Its totient is φ = 320773608.

The previous prime is 642868231. The next prime is 642868273.

642868246 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 642868196 and 642868205.

It is a congruent number.

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, 329041 + ... + 330988.

It is an arithmetic number, because the mean of its divisors is an integer number (120785490).

Almost surely, 2^642868246 is an apocalyptic number.

642868246 is a deficient number, since it is larger than the sum of its proper divisors (323415674).

642868246 is a wasteful number, since it uses less digits than its factorization.

642868246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660518.

The product of its digits is 884736, while the sum is 46.

The square root of 642868246 is about 25354.8465978400. The cubic root of 642868246 is about 863.0593427324.

The spelling of 642868246 in words is "six hundred forty-two million, eight hundred sixty-eight thousand, two hundred forty-six".