29646421 has 12 divisors (see below), whose sum is σ = 34614732. Its totient is φ = 25316928.

The previous prime is 29646377. The next prime is 29646437. The reversal of 29646421 is 12464692.

It can be written as a sum of positive squares in 2 ways, for example, as 7452900 + 22193521 = 2730^2 + 4711^2 .

It is not a de Polignac number, because 29646421 - 2⁷ = 29646293 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 (29646481) 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 11 ways as a sum of consecutive naturals, for example, 14371 + ... + 16303.

It is an arithmetic number, because the mean of its divisors is an integer number (2884561).

Almost surely, 2^29646421 is an apocalyptic number.

It is an amenable number.

29646421 is a deficient number, since it is larger than the sum of its proper divisors (4968311).

29646421 is a wasteful number, since it uses less digits than its factorization.

29646421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260 (or 2253 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 29646421 is about 5444.8527069150. The cubic root of 29646421 is about 309.4976985134.

The spelling of 29646421 in words is "twenty-nine million, six hundred forty-six thousand, four hundred twenty-one".