381467840 has 112 divisors (see below), whose sum is σ = 988539552. Its totient is φ = 139370496.

The previous prime is 381467837. The next prime is 381467843. The reversal of 381467840 is 48764183.

It is an interprime number because it is at equal distance from previous prime (381467837) and next prime (381467843).

It is not an unprimeable number, because it can be changed into a prime (381467843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444692 + ... + 445548.

It is an arithmetic number, because the mean of its divisors is an integer number (8826246).

Almost surely, 2^381467840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381467840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494269776).

381467840 is an abundant number, since it is smaller than the sum of its proper divisors (607071712).

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

381467840 is a wasteful number, since it uses less digits than its factorization.

381467840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 381467840 is about 19531.2017039403. The cubic root of 381467840 is about 725.2470596758.

The spelling of 381467840 in words is "three hundred eighty-one million, four hundred sixty-seven thousand, eight hundred forty".