172049640 has 64 divisors (see below), whose sum is σ = 589887360. Its totient is φ = 39325440.

The previous prime is 172049623. The next prime is 172049701. The reversal of 172049640 is 46940271.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101571 + ... + 103250.

It is an arithmetic number, because the mean of its divisors is an integer number (9216990).

Almost surely, 2^172049640 is an apocalyptic number.

172049640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172049640 is an abundant number, since it is smaller than the sum of its proper divisors (417837720).

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

172049640 is a wasteful number, since it uses less digits than its factorization.

172049640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204842 (or 204838 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 172049640 is about 13116.7694193349. The cubic root of 172049640 is about 556.1832720528.

It can be divided in two parts, 1720 and 49640, that added together give a triangular number (51360 = T₃₂₀).

The spelling of 172049640 in words is "one hundred seventy-two million, forty-nine thousand, six hundred forty".