172029138 has 8 divisors (see below), whose sum is σ = 344058288. Its totient is φ = 57343044.

The previous prime is 172029127. The next prime is 172029161. The reversal of 172029138 is 831920271.

It is a sphenic number, since it is the product of 3 distinct primes.

172029138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 172029099 and 172029108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14335756 + ... + 14335767.

It is an arithmetic number, because the mean of its divisors is an integer number (43007286).

Almost surely, 2^172029138 is an apocalyptic number.

172029138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

172029138 is a wasteful number, since it uses less digits than its factorization.

172029138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28671528.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 172029138 is about 13115.9878773960. The cubic root of 172029138 is about 556.1611789670.

The spelling of 172029138 in words is "one hundred seventy-two million, twenty-nine thousand, one hundred thirty-eight".