29023220 has 12 divisors (see below), whose sum is σ = 60948804. Its totient is φ = 11609280.

The previous prime is 29023219. The next prime is 29023243. The reversal of 29023220 is 2232092.

It can be written as a sum of positive squares in 2 ways, for example, as 12588304 + 16434916 = 3548^2 + 4054^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1451161 = 29023220 / (2 + 9 + 0 + 2 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 29023192 and 29023201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725561 + ... + 725600.

It is an arithmetic number, because the mean of its divisors is an integer number (5079067).

Almost surely, 2^29023220 is an apocalyptic number.

29023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29023220 is an abundant number, since it is smaller than the sum of its proper divisors (31925584).

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

29023220 is a wasteful number, since it uses less digits than its factorization.

29023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451170 (or 1451168 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 29023220 is about 5387.3202986271. The cubic root of 29023220 is about 307.3136597697.

The spelling of 29023220 in words is "twenty-nine million, twenty-three thousand, two hundred twenty".