381861610 has 16 divisors (see below), whose sum is σ = 740224296. Its totient is φ = 140995008.

The previous prime is 381861581. The next prime is 381861631. The reversal of 381861610 is 16168183.

It can be written as a sum of positive squares in 4 ways, for example, as 186896241 + 194965369 = 13671^2 + 13963^2 .

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 7 ways as a sum of consecutive naturals, for example, 1468569 + ... + 1468828.

Almost surely, 2^381861610 is an apocalyptic number.

381861610 is a deficient number, since it is larger than the sum of its proper divisors (358362686).

381861610 is a wasteful number, since it uses less digits than its factorization.

381861610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937417.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 381861610 is about 19541.2796408014. The cubic root of 381861610 is about 725.4965191737.

The spelling of 381861610 in words is "three hundred eighty-one million, eight hundred sixty-one thousand, six hundred ten".