30205056 has 128 divisors (see below), whose sum is σ = 97234560. Its totient is φ = 8110080.

The previous prime is 30205051. The next prime is 30205081. The reversal of 30205056 is 65050203.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (30205051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45366 + ... + 46026.

It is an arithmetic number, because the mean of its divisors is an integer number (759645).

Almost surely, 2^30205056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30205056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48617280).

30205056 is an abundant number, since it is smaller than the sum of its proper divisors (67029504).

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

30205056 is a wasteful number, since it uses less digits than its factorization.

30205056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 30205056 is about 5495.9126630615. The cubic root of 30205056 is about 311.4295955494.

Adding to 30205056 its reverse (65050203), we get a palindrome (95255259).

The spelling of 30205056 in words is "thirty million, two hundred five thousand, fifty-six".