172285386 has 64 divisors (see below), whose sum is σ = 428590848. Its totient is φ = 44955648.

The previous prime is 172285367. The next prime is 172285397. The reversal of 172285386 is 683582271.

172285386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51336 + ... + 54588.

It is an arithmetic number, because the mean of its divisors is an integer number (6696732).

Almost surely, 2^172285386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172285386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214295424).

172285386 is an abundant number, since it is smaller than the sum of its proper divisors (256305462).

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

172285386 is a wasteful number, since it uses less digits than its factorization.

172285386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375.

The product of its digits is 161280, while the sum is 42.

The square root of 172285386 is about 13125.7527784124. The cubic root of 172285386 is about 556.4371874158.

The spelling of 172285386 in words is "one hundred seventy-two million, two hundred eighty-five thousand, three hundred eighty-six".