172273240 has 32 divisors (see below), whose sum is σ = 410417280. Its totient is φ = 64855552.

The previous prime is 172273219. The next prime is 172273259. The reversal of 172273240 is 42372271.

It is a junction number, because it is equal to n+sod(n) for n = 172273199 and 172273208.

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, 125992 + ... + 127351.

It is an arithmetic number, because the mean of its divisors is an integer number (12825540).

Almost surely, 2^172273240 is an apocalyptic number.

172273240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172273240 is an abundant number, since it is smaller than the sum of its proper divisors (238144040).

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

172273240 is a wasteful number, since it uses less digits than its factorization.

172273240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253371 (or 253367 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 172273240 is about 13125.2900920323. The cubic root of 172273240 is about 556.4241109634.

The spelling of 172273240 in words is "one hundred seventy-two million, two hundred seventy-three thousand, two hundred forty".