172104140 has 24 divisors (see below), whose sum is σ = 389220720. Its totient is φ = 63546048.

The previous prime is 172104137. The next prime is 172104151. The reversal of 172104140 is 41401271.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 7 ways as a sum of consecutive naturals, for example, 330710 + ... + 331229.

It is an arithmetic number, because the mean of its divisors is an integer number (16217530).

Almost surely, 2^172104140 is an apocalyptic number.

172104140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172104140 is an abundant number, since it is smaller than the sum of its proper divisors (217116580).

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

172104140 is a wasteful number, since it uses less digits than its factorization.

172104140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661961 (or 661959 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 172104140 is about 13118.8467480949. The cubic root of 172104140 is about 556.2419930674.

The spelling of 172104140 in words is "one hundred seventy-two million, one hundred four thousand, one hundred forty".