172041928 has 8 divisors (see below), whose sum is σ = 322578630. Its totient is φ = 86020960.

The previous prime is 172041917. The next prime is 172041929. The reversal of 172041928 is 829140271.

It can be written as a sum of positive squares in only one way, i.e., 135536164 + 36505764 = 11642^2 + 6042^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 172041893 and 172041902.

It is not an unprimeable number, because it can be changed into a prime (172041929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10752613 + ... + 10752628.

Almost surely, 2^172041928 is an apocalyptic number.

It is an amenable number.

172041928 is a deficient number, since it is larger than the sum of its proper divisors (150536702).

172041928 is a wasteful number, since it uses less digits than its factorization.

172041928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21505247 (or 21505243 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 172041928 is about 13116.4754412151. The cubic root of 172041928 is about 556.1749617584.

The spelling of 172041928 in words is "one hundred seventy-two million, forty-one thousand, nine hundred twenty-eight".