642907230 has 32 divisors (see below), whose sum is σ = 1763403264. Its totient is φ = 146950176.

The previous prime is 642907229. The next prime is 642907261. The reversal of 642907230 is 32709246.

It is a junction number, because it is equal to n+sod(n) for n = 642907191 and 642907200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530522 + ... + 1530941.

It is an arithmetic number, because the mean of its divisors is an integer number (55106352).

Almost surely, 2^642907230 is an apocalyptic number.

642907230 is an abundant number, since it is smaller than the sum of its proper divisors (1120496034).

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

642907230 is a wasteful number, since it uses less digits than its factorization.

642907230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061480.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 642907230 is about 25355.6153543944. The cubic root of 642907230 is about 863.0767878961.

The spelling of 642907230 in words is "six hundred forty-two million, nine hundred seven thousand, two hundred thirty".