381740 has 12 divisors (see below), whose sum is σ = 801696. Its totient is φ = 152688.

The previous prime is 381739. The next prime is 381749. The reversal of 381740 is 47183.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (381749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9524 + ... + 9563.

It is an arithmetic number, because the mean of its divisors is an integer number (66808).

2³⁸¹⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

381740 is an abundant number, since it is smaller than the sum of its proper divisors (419956).

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

381740 is a wasteful number, since it uses less digits than its factorization.

381740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19096 (or 19094 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 381740 is about 617.8511147518. The cubic root of 381740 is about 72.5419495634.

The spelling of 381740 in words is "three hundred eighty-one thousand, seven hundred forty".