73840345 has 8 divisors (see below), whose sum is σ = 91003464. Its totient is φ = 57475584.

The previous prime is 73840339. The next prime is 73840381. The reversal of 73840345 is 54304837.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20214016 + 53626329 = 4496^2 + 7323^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 73840345 - 2¹⁵ = 73807577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73840345.

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, 199384 + ... + 199753.

It is an arithmetic number, because the mean of its divisors is an integer number (11375433).

Almost surely, 2^73840345 is an apocalyptic number.

It is an amenable number.

73840345 is a deficient number, since it is larger than the sum of its proper divisors (17163119).

73840345 is a wasteful number, since it uses less digits than its factorization.

73840345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399179.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 73840345 is about 8593.0404979844. The cubic root of 73840345 is about 419.5314976186.

The spelling of 73840345 in words is "seventy-three million, eight hundred forty thousand, three hundred forty-five".