73145290 has 16 divisors (see below), whose sum is σ = 137386368. Its totient is φ = 27985936.

The previous prime is 73145287. The next prime is 73145299. The reversal of 73145290 is 9254137.

It is not an unprimeable number, because it can be changed into a prime (73145299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158782 + ... + 159241.

It is an arithmetic number, because the mean of its divisors is an integer number (8586648).

Almost surely, 2^73145290 is an apocalyptic number.

73145290 is a deficient number, since it is larger than the sum of its proper divisors (64241078).

73145290 is a wasteful number, since it uses less digits than its factorization.

73145290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318053.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 73145290 is about 8552.5019731071. The cubic root of 73145290 is about 418.2110035625.

The spelling of 73145290 in words is "seventy-three million, one hundred forty-five thousand, two hundred ninety".