380138687 has 4 divisors (see below), whose sum is σ = 396666480. Its totient is φ = 363610896.

The previous prime is 380138677. The next prime is 380138753. The reversal of 380138687 is 786831083.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 380138687 - 2⁶ = 380138623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380138677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8263862 + ... + 8263907.

It is an arithmetic number, because the mean of its divisors is an integer number (99166620).

Almost surely, 2^380138687 is an apocalyptic number.

380138687 is a deficient number, since it is larger than the sum of its proper divisors (16527793).

380138687 is a wasteful number, since it uses less digits than its factorization.

380138687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16527792.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 380138687 is about 19497.1456116017. The cubic root of 380138687 is about 724.4037504368.

The spelling of 380138687 in words is "three hundred eighty million, one hundred thirty-eight thousand, six hundred eighty-seven".