393724 has 12 divisors (see below), whose sum is σ = 693504. Its totient is φ = 195584.

The previous prime is 393721. The next prime is 393727. The reversal of 393724 is 427393.

It is an interprime number because it is at equal distance from previous prime (393721) and next prime (393727).

It is a d-powerful number, because it can be written as 3 + 9² + 7³ + 3⁴ + 2¹⁷ + 4⁹ .

It is a plaindrome in base 6.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 393692 and 393701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837 + ... + 1219.

It is an arithmetic number, because the mean of its divisors is an integer number (57792).

2³⁹³⁷²⁴ is an apocalyptic number.

It is an amenable number.

393724 is a deficient number, since it is larger than the sum of its proper divisors (299780).

393724 is a wasteful number, since it uses less digits than its factorization.

393724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 642 counting only the distinct ones).

The product of its digits is 4536, while the sum is 28.

The square root of 393724 is about 627.4743022627. The cubic root of 393724 is about 73.2932471459.

The spelling of 393724 in words is "three hundred ninety-three thousand, seven hundred twenty-four".