172388953028 has 12 divisors (see below), whose sum is σ = 304350409020. Its totient is φ = 85431693312.

The previous prime is 172388953021. The next prime is 172388953043. The reversal of 172388953028 is 820359883271.

172388953028 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20033005444 + 152355947584 = 141538^2 + 390328^2 .

It is a super-2 number, since 2×172388953028² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172388953021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190695293 + ... + 190696196.

It is an arithmetic number, because the mean of its divisors is an integer number (25362534085).

Almost surely, 2^172388953028 is an apocalyptic number.

It is an amenable number.

172388953028 is a deficient number, since it is larger than the sum of its proper divisors (131961455992).

172388953028 is a wasteful number, since it uses less digits than its factorization.

172388953028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381391606 (or 381391604 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 172388953028 in words is "one hundred seventy-two billion, three hundred eighty-eight million, nine hundred fifty-three thousand, twenty-eight".