73240645 has 8 divisors (see below), whose sum is σ = 88110360. Its totient is φ = 58444800.

The previous prime is 73240621. The next prime is 73240691. The reversal of 73240645 is 54604237.

73240645 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 4 ways, for example, as 37933281 + 35307364 = 6159^2 + 5942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73240645 - 2⁹ = 73240133 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 16260 + ... + 20269.

It is an arithmetic number, because the mean of its divisors is an integer number (11013795).

Almost surely, 2^73240645 is an apocalyptic number.

It is an amenable number.

73240645 is a deficient number, since it is larger than the sum of its proper divisors (14869715).

73240645 is a wasteful number, since it uses less digits than its factorization.

73240645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36935.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 73240645 is about 8558.0748419256. The cubic root of 73240645 is about 418.3926566065.

The spelling of 73240645 in words is "seventy-three million, two hundred forty thousand, six hundred forty-five".