381775240 has 64 divisors (see below), whose sum is σ = 1070962560. Its totient is φ = 118993920.

The previous prime is 381775237. The next prime is 381775243. The reversal of 381775240 is 42577183.

It is an interprime number because it is at equal distance from previous prime (381775237) and next prime (381775243).

It is a self number, because there is not a number n which added to its sum of digits gives 381775240.

It is not an unprimeable number, because it can be changed into a prime (381775243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 58897 + ... + 65056.

It is an arithmetic number, because the mean of its divisors is an integer number (16733790).

Almost surely, 2^381775240 is an apocalyptic number.

It is an amenable number.

381775240 is an abundant number, since it is smaller than the sum of its proper divisors (689187320).

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

381775240 is a wasteful number, since it uses less digits than its factorization.

381775240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123982 (or 123978 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 381775240 is about 19539.0695786673. The cubic root of 381775240 is about 725.4418171058.

The spelling of 381775240 in words is "three hundred eighty-one million, seven hundred seventy-five thousand, two hundred forty".