438655 has 16 divisors (see below), whose sum is σ = 612864. Its totient is φ = 295200.

The previous prime is 438637. The next prime is 438661. The reversal of 438655 is 556834.

It is not a de Polignac number, because 438655 - 2⁵ = 438623 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 2830 + ... + 2980.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2⁴³⁸⁶⁵⁵ is an apocalyptic number.

438655 is a deficient number, since it is larger than the sum of its proper divisors (174209).

438655 is a wasteful number, since it uses less digits than its factorization.

438655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246.

The product of its digits is 14400, while the sum is 31.

The square root of 438655 is about 662.3103502136. The cubic root of 438655 is about 75.9814705520.

The spelling of 438655 in words is "four hundred thirty-eight thousand, six hundred fifty-five".