381564086 has 4 divisors (see below), whose sum is σ = 572346132. Its totient is φ = 190782042.

The previous prime is 381564077. The next prime is 381564101. The reversal of 381564086 is 680465183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 680465183 = 19 ⋅35813957.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 95391020 + ... + 95391023.

It is an arithmetic number, because the mean of its divisors is an integer number (143086533).

Almost surely, 2^381564086 is an apocalyptic number.

381564086 is a deficient number, since it is larger than the sum of its proper divisors (190782046).

381564086 is a wasteful number, since it uses less digits than its factorization.

381564086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190782045.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 381564086 is about 19533.6654522391. The cubic root of 381564086 is about 725.3080488790.

The spelling of 381564086 in words is "three hundred eighty-one million, five hundred sixty-four thousand, eighty-six".