381671740 has 48 divisors (see below), whose sum is σ = 817229952. Its totient is φ = 149700096.

The previous prime is 381671737. The next prime is 381671749. The reversal of 381671740 is 47176183.

It is a super-2 number, since 2×381671740² = 291346634229255200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381671740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381671749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286957 + ... + 288283.

It is an arithmetic number, because the mean of its divisors is an integer number (17025624).

Almost surely, 2^381671740 is an apocalyptic number.

It is an amenable number.

381671740 is an abundant number, since it is smaller than the sum of its proper divisors (435558212).

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

381671740 is a wasteful number, since it uses less digits than its factorization.

381671740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 381671740 is about 19536.4208595126. The cubic root of 381671740 is about 725.3762549579.

The spelling of 381671740 in words is "three hundred eighty-one million, six hundred seventy-one thousand, seven hundred forty".