381537638 has 8 divisors (see below), whose sum is σ = 573260520. Its totient is φ = 190450800.

The previous prime is 381537623. The next prime is 381537649. The reversal of 381537638 is 836735183.

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, 157508 + ... + 159911.

It is an arithmetic number, because the mean of its divisors is an integer number (71657565).

Almost surely, 2^381537638 is an apocalyptic number.

381537638 is a deficient number, since it is larger than the sum of its proper divisors (191722882).

381537638 is a wasteful number, since it uses less digits than its factorization.

381537638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318022.

The product of its digits is 362880, while the sum is 44.

The square root of 381537638 is about 19532.9884554310. The cubic root of 381537638 is about 725.2912903219.

The spelling of 381537638 in words is "three hundred eighty-one million, five hundred thirty-seven thousand, six hundred thirty-eight".