381440180 has 48 divisors (see below), whose sum is σ = 875568960. Its totient is φ = 138432000.

The previous prime is 381440177. The next prime is 381440183. The reversal of 381440180 is 81044183.

It is an interprime number because it is at equal distance from previous prime (381440177) and next prime (381440183).

It is a super-2 number, since 2×381440180² = 290993221836864800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381440183) 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, 134780 + ... + 137580.

It is an arithmetic number, because the mean of its divisors is an integer number (18241020).

Almost surely, 2^381440180 is an apocalyptic number.

It is an amenable number.

381440180 is an abundant number, since it is smaller than the sum of its proper divisors (494128780).

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

381440180 is a wasteful number, since it uses less digits than its factorization.

381440180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 381440180 is about 19530.4935933529. The cubic root of 381440180 is about 725.2295301783.

The spelling of 381440180 in words is "three hundred eighty-one million, four hundred forty thousand, one hundred eighty".