29979918 has 24 divisors (see below), whose sum is σ = 65235456. Its totient is φ = 9950400.

The previous prime is 29979907. The next prime is 29979919. The reversal of 29979918 is 81997992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29979919) 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, 883 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (2718144).

Almost surely, 2^29979918 is an apocalyptic number.

29979918 is an abundant number, since it is smaller than the sum of its proper divisors (35255538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29979918 is a wasteful number, since it uses less digits than its factorization.

29979918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7160 (or 7157 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 29979918 is about 5475.3920407584. The cubic root of 29979918 is about 310.6539024045.

The spelling of 29979918 in words is "twenty-nine million, nine hundred seventy-nine thousand, nine hundred eighteen".