172408398 has 8 divisors (see below), whose sum is σ = 344816808. Its totient is φ = 57469464.

The previous prime is 172408381. The next prime is 172408409. The reversal of 172408398 is 893804271.

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

172408398 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 14367361 + ... + 14367372.

It is an arithmetic number, because the mean of its divisors is an integer number (43102101).

Almost surely, 2^172408398 is an apocalyptic number.

172408398 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.

172408398 is a wasteful number, since it uses less digits than its factorization.

172408398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28734738.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 172408398 is about 13130.4378449464. The cubic root of 172408398 is about 556.5695882123.

The spelling of 172408398 in words is "one hundred seventy-two million, four hundred eight thousand, three hundred ninety-eight".