638541480 has 32 divisors (see below), whose sum is σ = 1915624800. Its totient is φ = 170277696.

The previous prime is 638541427. The next prime is 638541499. The reversal of 638541480 is 84145836.

638541480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2660470 + ... + 2660709.

It is an arithmetic number, because the mean of its divisors is an integer number (59863275).

Almost surely, 2^638541480 is an apocalyptic number.

638541480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

638541480 is an abundant number, since it is smaller than the sum of its proper divisors (1277083320).

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

638541480 is a wasteful number, since it uses less digits than its factorization.

638541480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5321193 (or 5321189 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 638541480 is about 25269.3783065591. The cubic root of 638541480 is about 861.1187351512.

The spelling of 638541480 in words is "six hundred thirty-eight million, five hundred forty-one thousand, four hundred eighty".