172176540 has 48 divisors (see below), whose sum is σ = 495130272. Its totient is φ = 44672256.

The previous prime is 172176539. The next prime is 172176541. The reversal of 172176540 is 45671271.

It is an interprime number because it is at equal distance from previous prime (172176539) and next prime (172176541).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172176541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36559 + ... + 40998.

It is an arithmetic number, because the mean of its divisors is an integer number (10315214).

Almost surely, 2^172176540 is an apocalyptic number.

172176540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172176540 is an abundant number, since it is smaller than the sum of its proper divisors (322953732).

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

172176540 is a wasteful number, since it uses less digits than its factorization.

172176540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77606 (or 77604 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 172176540 is about 13121.6058468466. The cubic root of 172176540 is about 556.3199812640.

The spelling of 172176540 in words is "one hundred seventy-two million, one hundred seventy-six thousand, five hundred forty".