72829221 has 8 divisors (see below), whose sum is σ = 97285344. Its totient is φ = 48462960.

The previous prime is 72829217. The next prime is 72829259. The reversal of 72829221 is 12292827.

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

It is not a de Polignac number, because 72829221 - 2² = 72829217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72829271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20550 + ... + 23831.

It is an arithmetic number, because the mean of its divisors is an integer number (12160668).

Almost surely, 2^72829221 is an apocalyptic number.

It is an amenable number.

72829221 is a deficient number, since it is larger than the sum of its proper divisors (24456123).

72829221 is a wasteful number, since it uses less digits than its factorization.

72829221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44931.

The product of its digits is 8064, while the sum is 33.

The square root of 72829221 is about 8534.0038082954. The cubic root of 72829221 is about 417.6077549444.

The spelling of 72829221 in words is "seventy-two million, eight hundred twenty-nine thousand, two hundred twenty-one".