438910197 has 24 divisors (see below), whose sum is σ = 645473472. Its totient is φ = 265087680.

The previous prime is 438910187. The next prime is 438910217. The reversal of 438910197 is 791019834.

It is a happy number.

It is not a de Polignac number, because 438910197 - 2⁶ = 438910133 is a prime.

It is a super-2 number, since 2×438910197² = 385284322061157618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438910117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111688 + ... + 115550.

It is an arithmetic number, because the mean of its divisors is an integer number (26894728).

Almost surely, 2^438910197 is an apocalyptic number.

It is an amenable number.

438910197 is a deficient number, since it is larger than the sum of its proper divisors (206563275).

438910197 is a wasteful number, since it uses less digits than its factorization.

438910197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201 (or 4190 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 438910197 is about 20950.1836984786. The cubic root of 438910197 is about 759.9620231485.

The spelling of 438910197 in words is "four hundred thirty-eight million, nine hundred ten thousand, one hundred ninety-seven".