172861330 has 48 divisors (see below), whose sum is σ = 333618264. Its totient is φ = 64444160.

The previous prime is 172861319. The next prime is 172861331. The reversal of 172861330 is 33168271.

172861330 is digitally balanced in base 2, 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 4 ways, for example, as 91987281 + 80874049 = 9591^2 + 8993^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172861292 and 172861301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172861331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216492 + ... + 217288.

Almost surely, 2^172861330 is an apocalyptic number.

172861330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172861330 is a deficient number, since it is larger than the sum of its proper divisors (160756934).

172861330 is a wasteful number, since it uses less digits than its factorization.

172861330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 172861330 is about 13147.6739387619. The cubic root of 172861330 is about 557.0565477585.

The spelling of 172861330 in words is "one hundred seventy-two million, eight hundred sixty-one thousand, three hundred thirty".