638087462 has 4 divisors (see below), whose sum is σ = 957131196. Its totient is φ = 319043730.

The previous prime is 638087453. The next prime is 638087467. The reversal of 638087462 is 264780836.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638087467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159521864 + ... + 159521867.

It is an arithmetic number, because the mean of its divisors is an integer number (239282799).

Almost surely, 2^638087462 is an apocalyptic number.

638087462 is a deficient number, since it is larger than the sum of its proper divisors (319043734).

638087462 is a wasteful number, since it uses less digits than its factorization.

638087462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319043733.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 638087462 is about 25260.3931481677. The cubic root of 638087462 is about 860.9145948742.

The spelling of 638087462 in words is "six hundred thirty-eight million, eighty-seven thousand, four hundred sixty-two".