438198401 has 4 divisors (see below), whose sum is σ = 438693312. Its totient is φ = 437703492.

The previous prime is 438198391. The next prime is 438198403. The reversal of 438198401 is 104891834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438198401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438198403) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 246125 + ... + 247898.

It is an arithmetic number, because the mean of its divisors is an integer number (109673328).

Almost surely, 2^438198401 is an apocalyptic number.

It is an amenable number.

438198401 is a deficient number, since it is larger than the sum of its proper divisors (494911).

438198401 is an equidigital number, since it uses as much as digits as its factorization.

438198401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494910.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 438198401 is about 20933.1889830479. The cubic root of 438198401 is about 759.5509818809.

The spelling of 438198401 in words is "four hundred thirty-eight million, one hundred ninety-eight thousand, four hundred one".