172240636 has 24 divisors (see below), whose sum is σ = 304106544. Its totient is φ = 85357440.

The previous prime is 172240609. The next prime is 172240693. The reversal of 172240636 is 636042271.

172240636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 172240598 and 172240607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329071 + ... + 329593.

It is an arithmetic number, because the mean of its divisors is an integer number (12671106).

Almost surely, 2^172240636 is an apocalyptic number.

It is an amenable number.

172240636 is a deficient number, since it is larger than the sum of its proper divisors (131865908).

172240636 is a wasteful number, since it uses less digits than its factorization.

172240636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 172240636 is about 13124.0480035696. The cubic root of 172240636 is about 556.3890062729.

The spelling of 172240636 in words is "one hundred seventy-two million, two hundred forty thousand, six hundred thirty-six".