173280816 has 40 divisors (see below), whose sum is σ = 497381360. Its totient is φ = 57760128.

The previous prime is 173280787. The next prime is 173280823. The reversal of 173280816 is 618082371.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200125 + ... + 200988.

It is an arithmetic number, because the mean of its divisors is an integer number (12434534).

Almost surely, 2^173280816 is an apocalyptic number.

173280816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

173280816 is an abundant number, since it is smaller than the sum of its proper divisors (324100544).

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

173280816 is a wasteful number, since it uses less digits than its factorization.

173280816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401130 (or 401118 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 173280816 is about 13163.6171320804. The cubic root of 173280816 is about 557.5067904553.

The spelling of 173280816 in words is "one hundred seventy-three million, two hundred eighty thousand, eight hundred sixteen".