642952230 has 32 divisors (see below), whose sum is σ = 1547532000. Its totient is φ = 170959872.

The previous prime is 642952217. The next prime is 642952231. The reversal of 642952230 is 32259246.

It is a junction number, because it is equal to n+sod(n) for n = 642952191 and 642952200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642952231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20235 + ... + 41174.

It is an arithmetic number, because the mean of its divisors is an integer number (48360375).

Almost surely, 2^642952230 is an apocalyptic number.

642952230 is an abundant number, since it is smaller than the sum of its proper divisors (904579770).

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

642952230 is a wasteful number, since it uses less digits than its factorization.

642952230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61768.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 642952230 is about 25356.5027162659. The cubic root of 642952230 is about 863.0969243158.

The spelling of 642952230 in words is "six hundred forty-two million, nine hundred fifty-two thousand, two hundred thirty".