29138920 has 32 divisors (see below), whose sum is σ = 66679200. Its totient is φ = 11457088.

The previous prime is 29138891. The next prime is 29138929. The reversal of 29138920 is 2983192.

It is not an unprimeable number, because it can be changed into a prime (29138929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3814 + ... + 8533.

It is an arithmetic number, because the mean of its divisors is an integer number (2083725).

Almost surely, 2^29138920 is an apocalyptic number.

29138920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29138920 is an abundant number, since it is smaller than the sum of its proper divisors (37540280).

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

29138920 is a wasteful number, since it uses less digits than its factorization.

29138920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12417 (or 12413 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 29138920 is about 5398.0477952682. The cubic root of 29138920 is about 307.7214831950.

The spelling of 29138920 in words is "twenty-nine million, one hundred thirty-eight thousand, nine hundred twenty".