438550 has 36 divisors (see below), whose sum is σ = 954180. Its totient is φ = 149520.

The previous prime is 438533. The next prime is 438551. The reversal of 438550 is 55834.

It is a happy number.

It is a super-2 number, since 2×438550² = 384652205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438551) by changing a digit.

438550 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2361 + ... + 2539.

It is an arithmetic number, because the mean of its divisors is an integer number (26505).

2⁴³⁸⁵⁵⁰ is an apocalyptic number.

438550 is an abundant number, since it is smaller than the sum of its proper divisors (515630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438550 is a wasteful number, since it uses less digits than its factorization.

438550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 438550 is about 662.2310774949. The cubic root of 438550 is about 75.9754075556.

The spelling of 438550 in words is "four hundred thirty-eight thousand, five hundred fifty".