642629080 has 32 divisors (see below), whose sum is σ = 1481185440. Its totient is φ = 250781440.

The previous prime is 642629069. The next prime is 642629107. The reversal of 642629080 is 80926246.

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 7 ways as a sum of consecutive naturals, for example, 194284 + ... + 197563.

It is an arithmetic number, because the mean of its divisors is an integer number (46287045).

Almost surely, 2^642629080 is an apocalyptic number.

It is an amenable number.

642629080 is an abundant number, since it is smaller than the sum of its proper divisors (838556360).

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

642629080 is a wasteful number, since it uses less digits than its factorization.

642629080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391899 (or 391895 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 642629080 is about 25350.1297827053. The cubic root of 642629080 is about 862.9523015905.

The spelling of 642629080 in words is "six hundred forty-two million, six hundred twenty-nine thousand, eighty".