170820472 has 8 divisors (see below), whose sum is σ = 320288400. Its totient is φ = 85410232.

The previous prime is 170820449. The next prime is 170820479. The reversal of 170820472 is 274028071.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170820479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676272 + ... + 10676287.

It is an arithmetic number, because the mean of its divisors is an integer number (40036050).

Almost surely, 2^170820472 is an apocalyptic number.

It is an amenable number.

170820472 is a deficient number, since it is larger than the sum of its proper divisors (149467928).

170820472 is a wasteful number, since it uses less digits than its factorization.

170820472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21352565 (or 21352561 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 170820472 is about 13069.8306033399. The cubic root of 170820472 is about 554.8555986092.

The spelling of 170820472 in words is "one hundred seventy million, eight hundred twenty thousand, four hundred seventy-two".