170628213 has 8 divisors (see below), whose sum is σ = 260004928. Its totient is φ = 97501824.

The previous prime is 170628203. The next prime is 170628217. The reversal of 170628213 is 312826071.

170628213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 170628213 - 2⁵ = 170628181 is a prime.

It is a super-2 number, since 2×170628213² = 58227974143146738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170628217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4062556 + ... + 4062597.

It is an arithmetic number, because the mean of its divisors is an integer number (32500616).

Almost surely, 2^170628213 is an apocalyptic number.

It is an amenable number.

170628213 is a deficient number, since it is larger than the sum of its proper divisors (89376715).

170628213 is an equidigital number, since it uses as much as digits as its factorization.

170628213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125163.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 170628213 is about 13062.4734640879. The cubic root of 170628213 is about 554.6473565336.

The spelling of 170628213 in words is "one hundred seventy million, six hundred twenty-eight thousand, two hundred thirteen".