29661980 has 24 divisors (see below), whose sum is σ = 63467712. Its totient is φ = 11640512.

The previous prime is 29661979. The next prime is 29661997. The reversal of 29661980 is 8916692.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12932 + ... + 15051.

It is an arithmetic number, because the mean of its divisors is an integer number (2644488).

Almost surely, 2^29661980 is an apocalyptic number.

29661980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29661980 is an abundant number, since it is smaller than the sum of its proper divisors (33805732).

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

29661980 is a wasteful number, since it uses less digits than its factorization.

29661980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28045 (or 28043 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 29661980 is about 5446.2813001166. The cubic root of 29661980 is about 309.5518324511.

The spelling of 29661980 in words is "twenty-nine million, six hundred sixty-one thousand, nine hundred eighty".