29720080 has 120 divisors (see below), whose sum is σ = 80760456. Its totient is φ = 10076160.

The previous prime is 29720057. The next prime is 29720107. The reversal of 29720080 is 8002792.

It can be written as a sum of positive squares in 12 ways, for example, as 23001616 + 6718464 = 4796^2 + 2592^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 724860 + ... + 724900.

Almost surely, 2^29720080 is an apocalyptic number.

29720080 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 29720080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40380228).

29720080 is an abundant number, since it is smaller than the sum of its proper divisors (51040376).

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

29720080 is a wasteful number, since it uses less digits than its factorization.

29720080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 29720080 is about 5451.6126054590. The cubic root of 29720080 is about 309.7538107819.

The spelling of 29720080 in words is "twenty-nine million, seven hundred twenty thousand, eighty".