438002 has 4 divisors (see below), whose sum is σ = 657006. Its totient is φ = 219000.

The previous prime is 438001. The next prime is 438017. The reversal of 438002 is 200834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200834 = 2 ⋅100417.

It can be written as a sum of positive squares in only one way, i.e., 434281 + 3721 = 659^2 + 61^2 .

It is not an unprimeable number, because it can be changed into a prime (438001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109499 + ... + 109502.

2⁴³⁸⁰⁰² is an apocalyptic number.

438002 is a deficient number, since it is larger than the sum of its proper divisors (219004).

438002 is a wasteful number, since it uses less digits than its factorization.

438002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219003.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 438002 is about 661.8171953040. The cubic root of 438002 is about 75.9437487731.

Adding to 438002 its reverse (200834), we get a palindrome (638836).

The spelling of 438002 in words is "four hundred thirty-eight thousand, two".