381860040 has 32 divisors (see below), whose sum is σ = 1145580480. Its totient is φ = 101829312.

The previous prime is 381859999. The next prime is 381860041. The reversal of 381860040 is 40068183.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (381860041) 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 7 ways as a sum of consecutive naturals, for example, 1590964 + ... + 1591203.

It is an arithmetic number, because the mean of its divisors is an integer number (35799390).

Almost surely, 2^381860040 is an apocalyptic number.

381860040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381860040 is an abundant number, since it is smaller than the sum of its proper divisors (763720440).

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

381860040 is a wasteful number, since it uses less digits than its factorization.

381860040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182181 (or 3182177 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 381860040 is about 19541.2394693888. The cubic root of 381860040 is about 725.4955248946.

The spelling of 381860040 in words is "three hundred eighty-one million, eight hundred sixty thousand, forty".