638430060 has 24 divisors (see below), whose sum is σ = 1787604336. Its totient is φ = 170248000.

The previous prime is 638430059. The next prime is 638430061. The reversal of 638430060 is 60034836.

638430060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (638430059) and next prime (638430061).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (638430061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5320191 + ... + 5320310.

It is an arithmetic number, because the mean of its divisors is an integer number (74483514).

Almost surely, 2^638430060 is an apocalyptic number.

638430060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

638430060 is an abundant number, since it is smaller than the sum of its proper divisors (1149174276).

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

638430060 is a wasteful number, since it uses less digits than its factorization.

638430060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10640513 (or 10640511 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 638430060 is about 25267.1735657157. The cubic root of 638430060 is about 861.0686462984.

Adding to 638430060 its reverse (60034836), we get a palindrome (698464896).

The spelling of 638430060 in words is "six hundred thirty-eight million, four hundred thirty thousand, sixty".