170120400 has 60 divisors (see below), whose sum is σ = 544956192. Its totient is φ = 45365120.

The previous prime is 170120393. The next prime is 170120459. The reversal of 170120400 is 4021071.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 170120400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69684 + ... + 72083.

Almost surely, 2^170120400 is an apocalyptic number.

170120400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

170120400 is an abundant number, since it is smaller than the sum of its proper divisors (374835792).

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

170120400 is a wasteful number, since it uses less digits than its factorization.

170120400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141788 (or 141777 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 170120400 is about 13043.0211224241. The cubic root of 170120400 is about 554.0965741966.

Adding to 170120400 its reverse (4021071), we get a palindrome (174141471).

The spelling of 170120400 in words is "one hundred seventy million, one hundred twenty thousand, four hundred".