29939680 has 24 divisors (see below), whose sum is σ = 70732872. Its totient is φ = 11975808.

The previous prime is 29939639. The next prime is 29939681. The reversal of 29939680 is 8693992.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 29939680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29939681) 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 3 ways as a sum of consecutive naturals, for example, 93402 + ... + 93721.

It is an arithmetic number, because the mean of its divisors is an integer number (2947203).

Almost surely, 2^29939680 is an apocalyptic number.

29939680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29939680 is an abundant number, since it is smaller than the sum of its proper divisors (40793192).

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

29939680 is a wasteful number, since it uses less digits than its factorization.

29939680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187138 (or 187130 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 29939680 is about 5471.7163669182. The cubic root of 29939680 is about 310.5148572355.

The spelling of 29939680 in words is "twenty-nine million, nine hundred thirty-nine thousand, six hundred eighty".