432638 has 4 divisors (see below), whose sum is σ = 648960. Its totient is φ = 216318.

The previous prime is 432637. The next prime is 432659. The reversal of 432638 is 836234.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108158 + ... + 108161.

It is an arithmetic number, because the mean of its divisors is an integer number (162240).

2⁴³²⁶³⁸ is an apocalyptic number.

432638 is a deficient number, since it is larger than the sum of its proper divisors (216322).

432638 is a wasteful number, since it uses less digits than its factorization.

432638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216321.

The product of its digits is 3456, while the sum is 26.

The square root of 432638 is about 657.7522329875. The cubic root of 432638 is about 75.6324590234.

The spelling of 432638 in words is "four hundred thirty-two thousand, six hundred thirty-eight".