381820931010 has 48 divisors (see below), whose sum is σ = 992881389240. Its totient is φ = 101803841280.

The previous prime is 381820930993. The next prime is 381820931017. The reversal of 381820931010 is 10139028183.

It can be written as a sum of positive squares in 4 ways, for example, as 366360246729 + 15460684281 = 605277^2 + 124341^2 .

It is not an unprimeable number, because it can be changed into a prime (381820931017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303990 + ... + 925230.

Almost surely, 2^381820931010 is an apocalyptic number.

381820931010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381820931010 is an abundant number, since it is smaller than the sum of its proper divisors (611060458230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381820931010 is a wasteful number, since it uses less digits than its factorization.

381820931010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628083 (or 628080 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

Adding to 381820931010 its reverse (10139028183), we get a palindrome (391959959193).

The spelling of 381820931010 in words is "three hundred eighty-one billion, eight hundred twenty million, nine hundred thirty-one thousand, ten".