30621204 has 36 divisors (see below), whose sum is σ = 77575680. Its totient is φ = 10184400.

The previous prime is 30621197. The next prime is 30621209. The reversal of 30621204 is 40212603.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30621209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26029 + ... + 27179.

It is an arithmetic number, because the mean of its divisors is an integer number (2154880).

Almost surely, 2^30621204 is an apocalyptic number.

It is an amenable number.

30621204 is an abundant number, since it is smaller than the sum of its proper divisors (46954476).

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

30621204 is a wasteful number, since it uses less digits than its factorization.

30621204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30621204 is about 5533.6429230661. The cubic root of 30621204 is about 312.8533100532.

Adding to 30621204 its reverse (40212603), we get a palindrome (70833807).

The spelling of 30621204 in words is "thirty million, six hundred twenty-one thousand, two hundred four".