29821230 has 128 divisors (see below), whose sum is σ = 86313600. Its totient is φ = 7299072.

The previous prime is 29821189. The next prime is 29821261. The reversal of 29821230 is 3212892.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 29821194 and 29821203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 335026 + ... + 335114.

It is an arithmetic number, because the mean of its divisors is an integer number (674325).

Almost surely, 2^29821230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29821230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43156800).

29821230 is an abundant number, since it is smaller than the sum of its proper divisors (56492370).

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

29821230 is a wasteful number, since it uses less digits than its factorization.

29821230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 29821230 is about 5460.8817969262. The cubic root of 29821230 is about 310.1048206056.

It can be divided in two parts, 298 and 21230, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 29821230 in words is "twenty-nine million, eight hundred twenty-one thousand, two hundred thirty".