638227734 has 16 divisors (see below), whose sum is σ = 1276743600. Its totient is φ = 212694560.

The previous prime is 638227717. The next prime is 638227739. The reversal of 638227734 is 437722836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638227739) 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, 26092 + ... + 44240.

It is an arithmetic number, because the mean of its divisors is an integer number (79796475).

Almost surely, 2^638227734 is an apocalyptic number.

638227734 is an abundant number, since it is smaller than the sum of its proper divisors (638515866).

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

638227734 is a wasteful number, since it uses less digits than its factorization.

638227734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24015.

The product of its digits is 338688, while the sum is 42.

The square root of 638227734 is about 25263.1695161157. The cubic root of 638227734 is about 860.9776757584.

The spelling of 638227734 in words is "six hundred thirty-eight million, two hundred twenty-seven thousand, seven hundred thirty-four".