381313220 has 24 divisors (see below), whose sum is σ = 801124800. Its totient is φ = 152455392.

The previous prime is 381313193. The next prime is 381313241. The reversal of 381313220 is 22313183.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82121 + ... + 86639.

It is an arithmetic number, because the mean of its divisors is an integer number (33380200).

Almost surely, 2^381313220 is an apocalyptic number.

It is an amenable number.

381313220 is an abundant number, since it is smaller than the sum of its proper divisors (419811580).

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

381313220 is a wasteful number, since it uses less digits than its factorization.

381313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747 (or 8745 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 381313220 is about 19527.2430209694. The cubic root of 381313220 is about 725.1490585313.

The spelling of 381313220 in words is "three hundred eighty-one million, three hundred thirteen thousand, two hundred twenty".