30256420 has 24 divisors (see below), whose sum is σ = 63718200. Its totient is φ = 12068352.

The previous prime is 30256411. The next prime is 30256441. The reversal of 30256420 is 2465203.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2630884 + 27625536 = 1622^2 + 5256^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30256391 and 30256400.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5836 + ... + 9724.

It is an arithmetic number, because the mean of its divisors is an integer number (2654925).

Almost surely, 2^30256420 is an apocalyptic number.

It is an amenable number.

30256420 is an abundant number, since it is smaller than the sum of its proper divisors (33461780).

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

30256420 is a wasteful number, since it uses less digits than its factorization.

30256420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 30256420 is about 5500.5836054004. The cubic root of 30256420 is about 311.6060252949.

The spelling of 30256420 in words is "thirty million, two hundred fifty-six thousand, four hundred twenty".