29130820 has 12 divisors (see below), whose sum is σ = 61174764. Its totient is φ = 11652320.

The previous prime is 29130797. The next prime is 29130821. The reversal of 29130820 is 2803192.

It can be written as a sum of positive squares in 2 ways, for example, as 8191044 + 20939776 = 2862^2 + 4576^2 .

It is not an unprimeable number, because it can be changed into a prime (29130821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728251 + ... + 728290.

It is an arithmetic number, because the mean of its divisors is an integer number (5097897).

Almost surely, 2^29130820 is an apocalyptic number.

29130820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29130820 is an abundant number, since it is smaller than the sum of its proper divisors (32043944).

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

29130820 is a wasteful number, since it uses less digits than its factorization.

29130820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456550 (or 1456548 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 29130820 is about 5397.2974718835. The cubic root of 29130820 is about 307.6929672101.

The spelling of 29130820 in words is "twenty-nine million, one hundred thirty thousand, eight hundred twenty".