29789980 has 24 divisors (see below), whose sum is σ = 68246640. Its totient is φ = 10832640.

The previous prime is 29789971. The next prime is 29789983. The reversal of 29789980 is 8998792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29789983) 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 7 ways as a sum of consecutive naturals, for example, 67485 + ... + 67924.

It is an arithmetic number, because the mean of its divisors is an integer number (2843610).

Almost surely, 2^29789980 is an apocalyptic number.

29789980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29789980 is an abundant number, since it is smaller than the sum of its proper divisors (38456660).

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

29789980 is a wasteful number, since it uses less digits than its factorization.

29789980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135429 (or 135427 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 29789980 is about 5458.0197874321. The cubic root of 29789980 is about 309.9964619784.

The spelling of 29789980 in words is "twenty-nine million, seven hundred eighty-nine thousand, nine hundred eighty".