423946 has 16 divisors (see below), whose sum is σ = 693576. Its totient is φ = 193536.

The previous prime is 423931. The next prime is 423949. The reversal of 423946 is 649324.

It can be written as a sum of positive squares in 4 ways, for example, as 416025 + 7921 = 645^2 + 89^2 .

It is a d-powerful number, because it can be written as 4⁷ + 2¹⁷ + 9 + 3⁸ + 4⁹ + 6⁵ .

It is not an unprimeable number, because it can be changed into a prime (423949) by changing a digit.

423946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1090 + ... + 1426.

2⁴²³⁹⁴⁶ is an apocalyptic number.

423946 is a deficient number, since it is larger than the sum of its proper divisors (269630).

423946 is a wasteful number, since it uses less digits than its factorization.

423946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its digits is 5184, while the sum is 28.

The square root of 423946 is about 651.1113576033. Note that the first 3 decimals coincide. The cubic root of 423946 is about 75.1225256498.

It can be divided in two parts, 423 and 946, that added together give a square (1369 = 37²).

The spelling of 423946 in words is "four hundred twenty-three thousand, nine hundred forty-six".