639262134 has 96 divisors (see below), whose sum is σ = 1650355200. Its totient is φ = 178679088.

The previous prime is 639262103. The next prime is 639262147. The reversal of 639262134 is 431262936.

639262134 is a `hidden beast` number, since 639 + 2 + 6 + 2 + 13 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289077 + ... + 291279.

It is an arithmetic number, because the mean of its divisors is an integer number (17191200).

Almost surely, 2^639262134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639262134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825177600).

639262134 is an abundant number, since it is smaller than the sum of its proper divisors (1011093066).

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

639262134 is a wasteful number, since it uses less digits than its factorization.

639262134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279 (or 2262 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 639262134 is about 25283.6337182771. The cubic root of 639262134 is about 861.4425644664.

The spelling of 639262134 in words is "six hundred thirty-nine million, two hundred sixty-two thousand, one hundred thirty-four".