30020256 has 72 divisors (see below), whose sum is σ = 97572384. Its totient is φ = 8576640.

The previous prime is 30020251. The next prime is 30020257. The reversal of 30020256 is 65202003.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (30020251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5430 + ... + 9461.

It is an arithmetic number, because the mean of its divisors is an integer number (1355172).

Almost surely, 2^30020256 is an apocalyptic number.

30020256 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30020256 is an abundant number, since it is smaller than the sum of its proper divisors (67552128).

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

30020256 is a wasteful number, since it uses less digits than its factorization.

30020256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14914 (or 14903 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30020256 is about 5479.0743743811. The cubic root of 30020256 is about 310.7931683079.

Adding to 30020256 its reverse (65202003), we get a palindrome (95222259).

It can be divided in two parts, 30020 and 256, that added together give a square (30276 = 174²).

The spelling of 30020256 in words is "thirty million, twenty thousand, two hundred fifty-six".