29101920 has 96 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 7349760.

The previous prime is 29101913. The next prime is 29101931. The reversal of 29101920 is 2910192.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7525 + ... + 10715.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^29101920 is an apocalyptic number.

29101920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29101920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263040).

29101920 is an abundant number, since it is smaller than the sum of its proper divisors (67424160).

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

29101920 is a wasteful number, since it uses less digits than its factorization.

29101920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228 (or 3220 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 29101920 is about 5394.6195417286. The cubic root of 29101920 is about 307.5911818960.

The spelling of 29101920 in words is "twenty-nine million, one hundred one thousand, nine hundred twenty".