29978705 has 16 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 23090880.

The previous prime is 29978639. The next prime is 29978737. The reversal of 29978705 is 50787992.

It is not a de Polignac number, because 29978705 - 2²² = 25784401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29978705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41336 + ... + 42054.

It is an arithmetic number, because the mean of its divisors is an integer number (2332800).

Almost surely, 2^29978705 is an apocalyptic number.

It is an amenable number.

29978705 is a deficient number, since it is larger than the sum of its proper divisors (7346095).

29978705 is a wasteful number, since it uses less digits than its factorization.

29978705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 29978705 is about 5475.2812713138. The cubic root of 29978705 is about 310.6497126192.

The spelling of 29978705 in words is "twenty-nine million, nine hundred seventy-eight thousand, seven hundred five".