431138 has 8 divisors (see below), whose sum is σ = 655788. Its totient is φ = 212544.

The previous prime is 431107. The next prime is 431141. The reversal of 431138 is 831134.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 413449 + 17689 = 643^2 + 133^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

431138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1331 + ... + 1622.

2⁴³¹¹³⁸ is an apocalyptic number.

431138 is a deficient number, since it is larger than the sum of its proper divisors (224650).

431138 is a wasteful number, since it uses less digits than its factorization.

431138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028.

The product of its digits is 288, while the sum is 20.

The square root of 431138 is about 656.6109959481. The cubic root of 431138 is about 75.5449493314.

The spelling of 431138 in words is "four hundred thirty-one thousand, one hundred thirty-eight".