403438 has 8 divisors (see below), whose sum is σ = 691632. Its totient is φ = 172896.

The previous prime is 403433. The next prime is 403439. The reversal of 403438 is 834304.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403433) 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, 14395 + ... + 14422.

It is an arithmetic number, because the mean of its divisors is an integer number (86454).

2⁴⁰³⁴³⁸ is an apocalyptic number.

403438 is a deficient number, since it is larger than the sum of its proper divisors (288194).

403438 is a wasteful number, since it uses less digits than its factorization.

403438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28826.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 403438 is about 635.1676943926. The cubic root of 403438 is about 73.8911230619.

It can be divided in two parts, 403 and 438, that added together give a square (841 = 29²).

The spelling of 403438 in words is "four hundred three thousand, four hundred thirty-eight".