638119942 has 8 divisors (see below), whose sum is σ = 957740616. Its totient is φ = 318873072.

The previous prime is 638119907. The next prime is 638120017. The reversal of 638119942 is 249911836.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89143 + ... + 96034.

It is an arithmetic number, because the mean of its divisors is an integer number (119717577).

Almost surely, 2^638119942 is an apocalyptic number.

638119942 is a deficient number, since it is larger than the sum of its proper divisors (319620674).

638119942 is a wasteful number, since it uses less digits than its factorization.

638119942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186902.

The product of its digits is 93312, while the sum is 43.

The square root of 638119942 is about 25261.0360436780. The cubic root of 638119942 is about 860.9292020836.

The spelling of 638119942 in words is "six hundred thirty-eight million, one hundred nineteen thousand, nine hundred forty-two".