29953905 has 32 divisors (see below), whose sum is σ = 50838528. Its totient is φ = 15033600.

The previous prime is 29953849. The next prime is 29953907. The reversal of 29953905 is 50935992.

It is not a de Polignac number, because 29953905 - 2⁶ = 29953841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29953907) 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 31 ways as a sum of consecutive naturals, for example, 16335 + ... + 18075.

It is an arithmetic number, because the mean of its divisors is an integer number (1588704).

Almost surely, 2^29953905 is an apocalyptic number.

It is an amenable number.

29953905 is a deficient number, since it is larger than the sum of its proper divisors (20884623).

29953905 is a wasteful number, since it uses less digits than its factorization.

29953905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817.

The product of its (nonzero) digits is 109350, while the sum is 42.

The square root of 29953905 is about 5473.0160789093. The cubic root of 29953905 is about 310.5640269270.

The spelling of 29953905 in words is "twenty-nine million, nine hundred fifty-three thousand, nine hundred five".