172830840 has 512 divisors, whose sum is σ = 725760000. Its totient is φ = 32514048.

The previous prime is 172830829. The next prime is 172830841. The reversal of 172830840 is 48038271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172830841) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9096351 + ... + 9096369.

It is an arithmetic number, because the mean of its divisors is an integer number (1417500).

Almost surely, 2^172830840 is an apocalyptic number.

172830840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172830840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362880000).

172830840 is an abundant number, since it is smaller than the sum of its proper divisors (552929160).

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

172830840 is a wasteful number, since it uses less digits than its factorization.

172830840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 172830840 is about 13146.5143669339. The cubic root of 172830840 is about 557.0237938494.

The spelling of 172830840 in words is "one hundred seventy-two million, eight hundred thirty thousand, eight hundred forty".