172870938 has 24 divisors (see below), whose sum is σ = 376242048. Its totient is φ = 57363912.

The previous prime is 172870937. The next prime is 172870939. The reversal of 172870938 is 839078271.

172870938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (172870937) and next prime (172870939).

It is a super-2 number, since 2×172870938² = 59768722409999688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172870893 and 172870902.

It is not an unprimeable number, because it can be changed into a prime (172870933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17520 + ... + 25547.

It is an arithmetic number, because the mean of its divisors is an integer number (15676752).

Almost surely, 2^172870938 is an apocalyptic number.

172870938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

172870938 is an abundant number, since it is smaller than the sum of its proper divisors (203371110).

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

172870938 is a wasteful number, since it uses less digits than its factorization.

172870938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43298 (or 43295 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 172870938 is about 13148.0393215110. The cubic root of 172870938 is about 557.0668683628.

The spelling of 172870938 in words is "one hundred seventy-two million, eight hundred seventy thousand, nine hundred thirty-eight".