638229073398 has 32 divisors (see below), whose sum is σ = 1483534897920. Its totient is φ = 179260465440.

The previous prime is 638229073369. The next prime is 638229073399. The reversal of 638229073398 is 893370922836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638229073399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128776593 + ... + 128781548.

It is an arithmetic number, because the mean of its divisors is an integer number (46360465560).

Almost surely, 2^638229073398 is an apocalyptic number.

638229073398 is an abundant number, since it is smaller than the sum of its proper divisors (845305824522).

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

638229073398 is a wasteful number, since it uses less digits than its factorization.

638229073398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257558212.

The product of its (nonzero) digits is 23514624, while the sum is 60.

The spelling of 638229073398 in words is "six hundred thirty-eight billion, two hundred twenty-nine million, seventy-three thousand, three hundred ninety-eight".