172736228 has 24 divisors (see below), whose sum is σ = 346382400. Its totient is φ = 73834848.

The previous prime is 172736219. The next prime is 172736237. The reversal of 172736228 is 822637271.

It is an interprime number because it is at equal distance from previous prime (172736219) and next prime (172736237).

It is a junction number, because it is equal to n+sod(n) for n = 172736191 and 172736200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2963 + ... + 18821.

It is an arithmetic number, because the mean of its divisors is an integer number (14432600).

Almost surely, 2^172736228 is an apocalyptic number.

It is an amenable number.

172736228 is an abundant number, since it is smaller than the sum of its proper divisors (173646172).

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

172736228 is a wasteful number, since it uses less digits than its factorization.

172736228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16259 (or 16257 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 172736228 is about 13142.9155060816. The cubic root of 172736228 is about 556.9221322965.

The spelling of 172736228 in words is "one hundred seventy-two million, seven hundred thirty-six thousand, two hundred twenty-eight".