29839221 has 6 divisors (see below), whose sum is σ = 43101110. Its totient is φ = 19892808.

The previous prime is 29839181. The next prime is 29839223. The reversal of 29839221 is 12293892.

It can be written as a sum of positive squares in only one way, i.e., 16112196 + 13727025 = 4014^2 + 3705^2 .

It is not a de Polignac number, because 29839221 - 2⁷ = 29839093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29839223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1657726 + ... + 1657743.

Almost surely, 2^29839221 is an apocalyptic number.

It is an amenable number.

29839221 is a deficient number, since it is larger than the sum of its proper divisors (13261889).

29839221 is a wasteful number, since it uses less digits than its factorization.

29839221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315475 (or 3315472 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 29839221 is about 5462.5288099927. The cubic root of 29839221 is about 310.1671696352.

The spelling of 29839221 in words is "twenty-nine million, eight hundred thirty-nine thousand, two hundred twenty-one".