72329090 has 8 divisors (see below), whose sum is σ = 130192380. Its totient is φ = 28931632.

The previous prime is 72329083. The next prime is 72329093. The reversal of 72329090 is 9092327.

It can be written as a sum of positive squares in 2 ways, for example, as 68939809 + 3389281 = 8303^2 + 1841^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72329093) 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 3 ways as a sum of consecutive naturals, for example, 3616445 + ... + 3616464.

Almost surely, 2^72329090 is an apocalyptic number.

72329090 is a deficient number, since it is larger than the sum of its proper divisors (57863290).

72329090 is a wasteful number, since it uses less digits than its factorization.

72329090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232916.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 72329090 is about 8504.6510804383. The cubic root of 72329090 is about 416.6496298812.

The spelling of 72329090 in words is "seventy-two million, three hundred twenty-nine thousand, ninety".