638132887422 has 32 divisors (see below), whose sum is σ = 1430622416160. Its totient is φ = 210828562560.

The previous prime is 638132887421. The next prime is 638132887439. The reversal of 638132887422 is 224788231836.

638132887422 is a `hidden beast` number, since 6 + 3 + 8 + 132 + 8 + 87 + 422 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638132887421) 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, 52282729 + ... + 52294932.

It is an arithmetic number, because the mean of its divisors is an integer number (44706950505).

Almost surely, 2^638132887422 is an apocalyptic number.

638132887422 is an abundant number, since it is smaller than the sum of its proper divisors (792489528738).

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

638132887422 is a wasteful number, since it uses less digits than its factorization.

638132887422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104577785 (or 104577779 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

It can be divided in two parts, 63813 and 2887422, that added together give a triangular number (2951235 = T₂₄₂₉).

The spelling of 638132887422 in words is "six hundred thirty-eight billion, one hundred thirty-two million, eight hundred eighty-seven thousand, four hundred twenty-two".