172344438 has 48 divisors (see below), whose sum is σ = 440534016. Its totient is φ = 47651760.

The previous prime is 172344427. The next prime is 172344439. The reversal of 172344438 is 834443271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172344439) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 18156 + ... + 25967.

It is an arithmetic number, because the mean of its divisors is an integer number (9177792).

Almost surely, 2^172344438 is an apocalyptic number.

172344438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

172344438 is an abundant number, since it is smaller than the sum of its proper divisors (268189578).

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

172344438 is a wasteful number, since it uses less digits than its factorization.

172344438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44169 (or 44166 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 172344438 is about 13128.0020566726. The cubic root of 172344438 is about 556.5007543769.

The spelling of 172344438 in words is "one hundred seventy-two million, three hundred forty-four thousand, four hundred thirty-eight".