381630346 has 4 divisors (see below), whose sum is σ = 572445522. Its totient is φ = 190815172.

The previous prime is 381630341. The next prime is 381630377. The reversal of 381630346 is 643036183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 643036183 = 97 ⋅6629239.

It can be written as a sum of positive squares in only one way, i.e., 363474225 + 18156121 = 19065^2 + 4261^2 .

It is not an unprimeable number, because it can be changed into a prime (381630341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95407585 + ... + 95407588.

Almost surely, 2^381630346 is an apocalyptic number.

381630346 is a deficient number, since it is larger than the sum of its proper divisors (190815176).

381630346 is a wasteful number, since it uses less digits than its factorization.

381630346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190815175.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 381630346 is about 19535.3614248624. The cubic root of 381630346 is about 725.3500305814.

The spelling of 381630346 in words is "three hundred eighty-one million, six hundred thirty thousand, three hundred forty-six".