381631486 has 4 divisors (see below), whose sum is σ = 572447232. Its totient is φ = 190815742.

The previous prime is 381631463. The next prime is 381631489. The reversal of 381631486 is 684136183.

It is a happy number.

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

It is a super-2 number, since 2×381631486² = 291285182213136392, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381631489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95407870 + ... + 95407873.

It is an arithmetic number, because the mean of its divisors is an integer number (143111808).

Almost surely, 2^381631486 is an apocalyptic number.

381631486 is a deficient number, since it is larger than the sum of its proper divisors (190815746).

381631486 is a wasteful number, since it uses less digits than its factorization.

381631486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190815745.

The product of its digits is 82944, while the sum is 40.

The square root of 381631486 is about 19535.3906026985. The cubic root of 381631486 is about 725.3507528320.

The spelling of 381631486 in words is "three hundred eighty-one million, six hundred thirty-one thousand, four hundred eighty-six".