30730256 has 40 divisors (see below), whose sum is σ = 62287680. Its totient is φ = 14668416.

The previous prime is 30730253. The next prime is 30730283. The reversal of 30730256 is 65203703.

It is not an unprimeable number, because it can be changed into a prime (30730253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47471 + ... + 48113.

It is an arithmetic number, because the mean of its divisors is an integer number (1557192).

Almost surely, 2^30730256 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 30730256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31143840).

30730256 is an abundant number, since it is smaller than the sum of its proper divisors (31557424).

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

30730256 is a wasteful number, since it uses less digits than its factorization.

30730256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 30730256 is about 5543.4877108189. The cubic root of 30730256 is about 313.2242606122.

Adding to 30730256 its reverse (65203703), we get a palindrome (95933959).

The spelling of 30730256 in words is "thirty million, seven hundred thirty thousand, two hundred fifty-six".