381400 has 24 divisors (see below), whose sum is σ = 887220. Its totient is φ = 152480.

The previous prime is 381389. The next prime is 381401. The reversal of 381400 is 4183.

381400 = T₆₁ + T₆₂ + ... + T₁₃₅.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 754 + ... + 1153.

2³⁸¹⁴⁰⁰ is an apocalyptic number.

It is an amenable number.

381400 is an abundant number, since it is smaller than the sum of its proper divisors (505820).

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

381400 is a wasteful number, since it uses less digits than its factorization.

381400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923 (or 1914 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 381400 is about 617.5759062658. The cubic root of 381400 is about 72.5204064634.

Adding to 381400 its reverse (4183), we get a palindrome (385583).

The spelling of 381400 in words is "three hundred eighty-one thousand, four hundred".