29978685 has 48 divisors (see below), whose sum is σ = 57552768. Its totient is φ = 14313600.

The previous prime is 29978639. The next prime is 29978737. The reversal of 29978685 is 58687992.

It is a happy number.

It is not a de Polignac number, because 29978685 - 2¹¹ = 29976637 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 34719 + ... + 35571.

It is an arithmetic number, because the mean of its divisors is an integer number (1199016).

Almost surely, 2^29978685 is an apocalyptic number.

It is an amenable number.

29978685 is a deficient number, since it is larger than the sum of its proper divisors (27574083).

29978685 is a wasteful number, since it uses less digits than its factorization.

29978685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 943 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 29978685 is about 5475.2794449233. The cubic root of 29978685 is about 310.6496435368.

The spelling of 29978685 in words is "twenty-nine million, nine hundred seventy-eight thousand, six hundred eighty-five".