172878160 has 80 divisors (see below), whose sum is σ = 494718336. Its totient is φ = 54710784.

The previous prime is 172878137. The next prime is 172878161. The reversal of 172878160 is 61878271.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172878161) 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 15 ways as a sum of consecutive naturals, for example, 4594 + ... + 19153.

Almost surely, 2^172878160 is an apocalyptic number.

172878160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172878160 is an abundant number, since it is smaller than the sum of its proper divisors (321840176).

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

172878160 is a wasteful number, since it uses less digits than its factorization.

172878160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23780 (or 23774 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 172878160 is about 13148.3139603525. The cubic root of 172878160 is about 557.0746257509.

Subtracting from 172878160 its product of nonzero digits (37632), we obtain a triangular number (172840528 = T₁₈₅₉₂).

The spelling of 172878160 in words is "one hundred seventy-two million, eight hundred seventy-eight thousand, one hundred sixty".