172734820 has 12 divisors (see below), whose sum is σ = 362743164. Its totient is φ = 69093920.

The previous prime is 172734799. The next prime is 172734829. The reversal of 172734820 is 28437271.

172734820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 106832896 + 65901924 = 10336^2 + 8118^2 .

It is not an unprimeable number, because it can be changed into a prime (172734829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4318351 + ... + 4318390.

It is an arithmetic number, because the mean of its divisors is an integer number (30228597).

Almost surely, 2^172734820 is an apocalyptic number.

172734820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172734820 is an abundant number, since it is smaller than the sum of its proper divisors (190008344).

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

172734820 is a wasteful number, since it uses less digits than its factorization.

172734820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8636750 (or 8636748 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 172734820 is about 13142.8619409929. The cubic root of 172734820 is about 556.9206191059.

The spelling of 172734820 in words is "one hundred seventy-two million, seven hundred thirty-four thousand, eight hundred twenty".