29390221 has 8 divisors (see below), whose sum is σ = 33714944. Its totient is φ = 25097040.

The previous prime is 29390197. The next prime is 29390267. The reversal of 29390221 is 12209392.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29390221 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 29390221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29390281) 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, 5850 + ... + 9643.

It is an arithmetic number, because the mean of its divisors is an integer number (4214368).

Almost surely, 2^29390221 is an apocalyptic number.

It is an amenable number.

29390221 is a deficient number, since it is larger than the sum of its proper divisors (4324723).

29390221 is a wasteful number, since it uses less digits than its factorization.

29390221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15771.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 29390221 is about 5421.2748500699. The cubic root of 29390221 is about 308.6035734178.

The spelling of 29390221 in words is "twenty-nine million, three hundred ninety thousand, two hundred twenty-one".