172345540 has 12 divisors (see below), whose sum is σ = 361925676. Its totient is φ = 68938208.

The previous prime is 172345493. The next prime is 172345553. The reversal of 172345540 is 45543271.

It can be written as a sum of positive squares in 2 ways, for example, as 62473216 + 109872324 = 7904^2 + 10482^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4308619 + ... + 4308658.

It is an arithmetic number, because the mean of its divisors is an integer number (30160473).

Almost surely, 2^172345540 is an apocalyptic number.

172345540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172345540 is an abundant number, since it is smaller than the sum of its proper divisors (189580136).

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

172345540 is a wasteful number, since it uses less digits than its factorization.

172345540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8617286 (or 8617284 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 172345540 is about 13128.0440279579. The cubic root of 172345540 is about 556.5019404949.

The spelling of 172345540 in words is "one hundred seventy-two million, three hundred forty-five thousand, five hundred forty".