172645340 has 24 divisors (see below), whose sum is σ = 414349152. Its totient is φ = 59192640.

The previous prime is 172645331. The next prime is 172645351. The reversal of 172645340 is 43546271.

It is a junction number, because it is equal to n+sod(n) for n = 172645297 and 172645306.

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, 616451 + ... + 616730.

It is an arithmetic number, because the mean of its divisors is an integer number (17264548).

Almost surely, 2^172645340 is an apocalyptic number.

172645340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172645340 is an abundant number, since it is smaller than the sum of its proper divisors (241703812).

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

172645340 is a wasteful number, since it uses less digits than its factorization.

172645340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233197 (or 1233195 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 172645340 is about 13139.4573708354. The cubic root of 172645340 is about 556.8244372546.

The spelling of 172645340 in words is "one hundred seventy-two million, six hundred forty-five thousand, three hundred forty".