642635046 has 20 divisors (see below), whose sum is σ = 1439978892. Its totient is φ = 214211628.

The previous prime is 642635033. The next prime is 642635051. The reversal of 642635046 is 640536246.

642635046 is a `hidden beast` number, since 642 + 6 + 3 + 5 + 0 + 4 + 6 = 666.

642635046 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 642635046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1983280 + ... + 1983603.

Almost surely, 2^642635046 is an apocalyptic number.

642635046 is an abundant number, since it is smaller than the sum of its proper divisors (797343846).

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

642635046 is a wasteful number, since it uses less digits than its factorization.

642635046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966897 (or 3966888 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 642635046 is about 25350.2474544135. The cubic root of 642635046 is about 862.9549720566.

The spelling of 642635046 in words is "six hundred forty-two million, six hundred thirty-five thousand, forty-six".