29157980 has 48 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 11169600.

The previous prime is 29157979. The next prime is 29157991. The reversal of 29157980 is 8975192.

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, 81041 + ... + 81399.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^29157980 is an apocalyptic number.

29157980 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 29157980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31933440).

29157980 is an abundant number, since it is smaller than the sum of its proper divisors (34708900).

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

29157980 is a wasteful number, since it uses less digits than its factorization.

29157980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 29157980 is about 5399.8129597237. The cubic root of 29157980 is about 307.7885629303.

The spelling of 29157980 in words is "twenty-nine million, one hundred fifty-seven thousand, nine hundred eighty".