638894301406 has 8 divisors (see below), whose sum is σ = 958345836480. Its totient is φ = 319445689248.

The previous prime is 638894301401. The next prime is 638894301413. The reversal of 638894301406 is 604103498836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638894301401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61806 + ... + 1132081.

It is an arithmetic number, because the mean of its divisors is an integer number (119793229560).

Almost surely, 2^638894301406 is an apocalyptic number.

638894301406 is a deficient number, since it is larger than the sum of its proper divisors (319451535074).

638894301406 is a wasteful number, since it uses less digits than its factorization.

638894301406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461458.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 638894301406 in words is "six hundred thirty-eight billion, eight hundred ninety-four million, three hundred one thousand, four hundred six".