381986542 has 8 divisors (see below), whose sum is σ = 654834096. Its totient is φ = 163708512.

The previous prime is 381986533. The next prime is 381986543. The reversal of 381986542 is 245689183.

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

It is a junction number, because it is equal to n+sod(n) for n = 381986492 and 381986501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381986543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13642363 + ... + 13642390.

It is an arithmetic number, because the mean of its divisors is an integer number (81854262).

Almost surely, 2^381986542 is an apocalyptic number.

381986542 is a deficient number, since it is larger than the sum of its proper divisors (272847554).

381986542 is a wasteful number, since it uses less digits than its factorization.

381986542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27284762.

The product of its digits is 414720, while the sum is 46.

The square root of 381986542 is about 19544.4759970688. The cubic root of 381986542 is about 725.5756297258.

The spelling of 381986542 in words is "three hundred eighty-one million, nine hundred eighty-six thousand, five hundred forty-two".