29085720 has 64 divisors (see below), whose sum is σ = 87851520. Its totient is φ = 7703424.

The previous prime is 29085709. The next prime is 29085757. The reversal of 29085720 is 2758092.

29085720 = 376² + 377² + ... + 519².

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, 18817 + ... + 20303.

It is an arithmetic number, because the mean of its divisors is an integer number (1372680).

Almost surely, 2^29085720 is an apocalyptic number.

29085720 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 29085720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43925760).

29085720 is an abundant number, since it is smaller than the sum of its proper divisors (58765800).

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

29085720 is a wasteful number, since it uses less digits than its factorization.

29085720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 29085720 is about 5393.1178366507. The cubic root of 29085720 is about 307.5340962919.

The spelling of 29085720 in words is "twenty-nine million, eighty-five thousand, seven hundred twenty".