170428628 has 6 divisors (see below), whose sum is σ = 298250106. Its totient is φ = 85214312.

The previous prime is 170428619. The next prime is 170428667. The reversal of 170428628 is 826824071.

It can be written as a sum of positive squares in only one way, i.e., 160073104 + 10355524 = 12652^2 + 3218^2 .

It is a junction number, because it is equal to n+sod(n) for n = 170428591 and 170428600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21303575 + ... + 21303582.

It is an arithmetic number, because the mean of its divisors is an integer number (49708351).

Almost surely, 2^170428628 is an apocalyptic number.

It is an amenable number.

170428628 is a deficient number, since it is larger than the sum of its proper divisors (127821478).

170428628 is a wasteful number, since it uses less digits than its factorization.

170428628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42607161 (or 42607159 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 170428628 is about 13054.8315960031. The cubic root of 170428628 is about 554.4310138771.

The spelling of 170428628 in words is "one hundred seventy million, four hundred twenty-eight thousand, six hundred twenty-eight".