381724 has 12 divisors (see below), whose sum is σ = 763504. Its totient is φ = 163584.

The previous prime is 381713. The next prime is 381737. The reversal of 381724 is 427183.

381724 is an admirable number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6789 + ... + 6844.

2³⁸¹⁷²⁴ is an apocalyptic number.

It is an amenable number.

381724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

381724 is a wasteful number, since it uses less digits than its factorization.

381724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13644 (or 13642 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 381724 is about 617.8381665129. The cubic root of 381724 is about 72.5409360573.

The spelling of 381724 in words is "three hundred eighty-one thousand, seven hundred twenty-four".