172012398 has 16 divisors (see below), whose sum is σ = 355888080. Its totient is φ = 55360256.

The previous prime is 172012391. The next prime is 172012403. The reversal of 172012398 is 893210271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172012391) 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 7 ways as a sum of consecutive naturals, for example, 494115 + ... + 494462.

It is an arithmetic number, because the mean of its divisors is an integer number (22243005).

Almost surely, 2^172012398 is an apocalyptic number.

172012398 is an abundant number, since it is smaller than the sum of its proper divisors (183875682).

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

172012398 is a wasteful number, since it uses less digits than its factorization.

172012398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988611.

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

The square root of 172012398 is about 13115.3497094054. The cubic root of 172012398 is about 556.1431385345.

The spelling of 172012398 in words is "one hundred seventy-two million, twelve thousand, three hundred ninety-eight".