423657 has 32 divisors (see below), whose sum is σ = 725760. Its totient is φ = 241920.

The previous prime is 423649. The next prime is 423667. The reversal of 423657 is 756324.

It is a happy number.

423657 is a `hidden beast` number, since 4 + 2 + 3 + 657 = 666.

It is not a de Polignac number, because 423657 - 2³ = 423649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 4⁸ + 2³ + 6⁷ + 3 + 5⁷ + 7² .

It is a self number, because there is not a number n which added to its sum of digits gives 423657.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423657.

It is not an unprimeable number, because it can be changed into a prime (423617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5932 + ... + 6002.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2⁴²³⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

423657 is a deficient number, since it is larger than the sum of its proper divisors (302103).

423657 is a wasteful number, since it uses less digits than its factorization.

423657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 104 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 423657 is about 650.8893915252. The cubic root of 423657 is about 75.1054516631.

The spelling of 423657 in words is "four hundred twenty-three thousand, six hundred fifty-seven".