29831980 has 36 divisors (see below), whose sum is σ = 63715680. Its totient is φ = 11732448.

The previous prime is 29831959. The next prime is 29831983. The reversal of 29831980 is 8913892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29831983) 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 11 ways as a sum of consecutive naturals, for example, 124701 + ... + 124939.

It is an arithmetic number, because the mean of its divisors is an integer number (1769880).

Almost surely, 2^29831980 is an apocalyptic number.

29831980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29831980 is an abundant number, since it is smaller than the sum of its proper divisors (33883700).

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

29831980 is a wasteful number, since it uses less digits than its factorization.

29831980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 29831980 is about 5461.8659815122. The cubic root of 29831980 is about 310.1420784734.

The spelling of 29831980 in words is "twenty-nine million, eight hundred thirty-one thousand, nine hundred eighty".