29631980 has 24 divisors (see below), whose sum is σ = 71117088. Its totient is φ = 10159488.

The previous prime is 29631961. The next prime is 29631991. The reversal of 29631980 is 8913692.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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, 105689 + ... + 105968.

It is an arithmetic number, because the mean of its divisors is an integer number (2963212).

Almost surely, 2^29631980 is an apocalyptic number.

29631980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29631980 is an abundant number, since it is smaller than the sum of its proper divisors (41485108).

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

29631980 is a wasteful number, since it uses less digits than its factorization.

29631980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211673 (or 211671 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 29631980 is about 5443.5264305411. The cubic root of 29631980 is about 309.4474374475.

The spelling of 29631980 in words is "twenty-nine million, six hundred thirty-one thousand, nine hundred eighty".