29139980 has 24 divisors (see below), whose sum is σ = 61605600. Its totient is φ = 11577600.

The previous prime is 29139973. The next prime is 29140049. The reversal of 29139980 is 8993192.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1805 + ... + 7844.

It is an arithmetic number, because the mean of its divisors is an integer number (2566900).

Almost surely, 2^29139980 is an apocalyptic number.

29139980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29139980 is an abundant number, since it is smaller than the sum of its proper divisors (32465620).

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

29139980 is a wasteful number, since it uses less digits than its factorization.

29139980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9809 (or 9807 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 29139980 is about 5398.1459780187. The cubic root of 29139980 is about 307.7252145255.

The spelling of 29139980 in words is "twenty-nine million, one hundred thirty-nine thousand, nine hundred eighty".