381805950 has 48 divisors (see below), whose sum is σ = 996721920. Its totient is φ = 96455520.

The previous prime is 381805913. The next prime is 381806017. The reversal of 381805950 is 59508183.

It is a junction number, because it is equal to n+sod(n) for n = 381805899 and 381805908.

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 23 ways as a sum of consecutive naturals, for example, 64134 + ... + 69833.

It is an arithmetic number, because the mean of its divisors is an integer number (20765040).

Almost surely, 2^381805950 is an apocalyptic number.

381805950 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381805950 is an abundant number, since it is smaller than the sum of its proper divisors (614915970).

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

381805950 is a wasteful number, since it uses less digits than its factorization.

381805950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134001 (or 133996 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 381805950 is about 19539.8554242348. The cubic root of 381805950 is about 725.4612680973.

The spelling of 381805950 in words is "three hundred eighty-one million, eight hundred five thousand, nine hundred fifty".