73145680 has 20 divisors (see below), whose sum is σ = 170063892. Its totient is φ = 29258240.

The previous prime is 73145621. The next prime is 73145693. The reversal of 73145680 is 8654137.

It can be written as a sum of positive squares in 2 ways, for example, as 14531344 + 58614336 = 3812^2 + 7656^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457081 + ... + 457240.

Almost surely, 2^73145680 is an apocalyptic number.

It is an amenable number.

73145680 is an abundant number, since it is smaller than the sum of its proper divisors (96918212).

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

73145680 is a wasteful number, since it uses less digits than its factorization.

73145680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914334 (or 914328 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 73145680 is about 8552.5247734222. The cubic root of 73145680 is about 418.2117468412.

The spelling of 73145680 in words is "seventy-three million, one hundred forty-five thousand, six hundred eighty".