29980905 has 8 divisors (see below), whose sum is σ = 47969472. Its totient is φ = 15989808.

The previous prime is 29980903. The next prime is 29980913. The reversal of 29980905 is 50908992.

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

It is not a de Polignac number, because 29980905 - 2¹ = 29980903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29980901) 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, 999349 + ... + 999378.

It is an arithmetic number, because the mean of its divisors is an integer number (5996184).

Almost surely, 2^29980905 is an apocalyptic number.

It is an amenable number.

29980905 is a deficient number, since it is larger than the sum of its proper divisors (17988567).

29980905 is a wasteful number, since it uses less digits than its factorization.

29980905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998735.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 29980905 is about 5475.4821705490. The cubic root of 29980905 is about 310.6573114870.

The spelling of 29980905 in words is "twenty-nine million, nine hundred eighty thousand, nine hundred five".