172040895 has 64 divisors (see below), whose sum is σ = 331914240. Its totient is φ = 84046464.

The previous prime is 172040887. The next prime is 172040899. The reversal of 172040895 is 598040271.

It is not a de Polignac number, because 172040895 - 2³ = 172040887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172040899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 292792 + ... + 293378.

It is an arithmetic number, because the mean of its divisors is an integer number (5186160).

Almost surely, 2^172040895 is an apocalyptic number.

172040895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172040895 is a deficient number, since it is larger than the sum of its proper divisors (159873345).

172040895 is a wasteful number, since it uses less digits than its factorization.

172040895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 172040895 is about 13116.4360631995. The cubic root of 172040895 is about 556.1738485998.

The spelling of 172040895 in words is "one hundred seventy-two million, forty thousand, eight hundred ninety-five".