438902 has 4 divisors (see below), whose sum is σ = 658356. Its totient is φ = 219450.

The previous prime is 438899. The next prime is 438913. The reversal of 438902 is 209834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 209834 = 2 ⋅104917.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109724 + ... + 109727.

It is an arithmetic number, because the mean of its divisors is an integer number (164589).

2⁴³⁸⁹⁰² is an apocalyptic number.

438902 is a deficient number, since it is larger than the sum of its proper divisors (219454).

438902 is a wasteful number, since it uses less digits than its factorization.

438902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219453.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 438902 is about 662.4967924451. The cubic root of 438902 is about 75.9957292152.

The spelling of 438902 in words is "four hundred thirty-eight thousand, nine hundred two".