381257086 has 8 divisors (see below), whose sum is σ = 653583600. Its totient is φ = 163395888.

The previous prime is 381257057. The next prime is 381257183. The reversal of 381257086 is 680752183.

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

It is a super-2 number, since 2×381257086² = 290713931250422792, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 13616311 + ... + 13616338.

It is an arithmetic number, because the mean of its divisors is an integer number (81697950).

Almost surely, 2^381257086 is an apocalyptic number.

381257086 is a deficient number, since it is larger than the sum of its proper divisors (272326514).

381257086 is a wasteful number, since it uses less digits than its factorization.

381257086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27232658.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 381257086 is about 19525.8056427897. The cubic root of 381257086 is about 725.1134731624.

The spelling of 381257086 in words is "three hundred eighty-one million, two hundred fifty-seven thousand, eighty-six".