29979998 has 4 divisors (see below), whose sum is σ = 44970000. Its totient is φ = 14989998.

The previous prime is 29979977. The next prime is 29980003. The reversal of 29979998 is 89997992.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 29979998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7494998 + ... + 7495001.

It is an arithmetic number, because the mean of its divisors is an integer number (11242500).

Almost surely, 2^29979998 is an apocalyptic number.

29979998 is a deficient number, since it is larger than the sum of its proper divisors (14990002).

29979998 is a wasteful number, since it uses less digits than its factorization.

29979998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14990001.

The product of its digits is 6613488, while the sum is 62.

The square root of 29979998 is about 5475.3993461665. The cubic root of 29979998 is about 310.6541787261.

The spelling of 29979998 in words is "twenty-nine million, nine hundred seventy-nine thousand, nine hundred ninety-eight".