29719980 has 96 divisors (see below), whose sum is σ = 94510080. Its totient is φ = 7750080.

The previous prime is 29719973. The next prime is 29719981. The reversal of 29719980 is 8991792.

It is a super-2 number, since 2×29719980² = 1766554422400800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (29719981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24795 + ... + 25965.

It is an arithmetic number, because the mean of its divisors is an integer number (984480).

Almost surely, 2^29719980 is an apocalyptic number.

29719980 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 29719980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47255040).

29719980 is an abundant number, since it is smaller than the sum of its proper divisors (64790100).

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

29719980 is a wasteful number, since it uses less digits than its factorization.

29719980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 29719980 is about 5451.6034338532. The cubic root of 29719980 is about 309.7534633690.

The spelling of 29719980 in words is "twenty-nine million, seven hundred nineteen thousand, nine hundred eighty".