30485556 has 72 divisors (see below), whose sum is σ = 82522440. Its totient is φ = 9455616.

The previous prime is 30485551. The next prime is 30485561. The reversal of 30485556 is 65558403.

It is an interprime number because it is at equal distance from previous prime (30485551) and next prime (30485561).

It can be written as a sum of positive squares in 4 ways, for example, as 17089956 + 13395600 = 4134^2 + 3660^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30485556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30485551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66480 + ... + 66936.

It is an arithmetic number, because the mean of its divisors is an integer number (1146145).

Almost surely, 2^30485556 is an apocalyptic number.

30485556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30485556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41261220).

30485556 is an abundant number, since it is smaller than the sum of its proper divisors (52036884).

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

30485556 is a wasteful number, since it uses less digits than its factorization.

30485556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 30485556 is about 5521.3726554182. The cubic root of 30485556 is about 312.3906595607.

The spelling of 30485556 in words is "thirty million, four hundred eighty-five thousand, five hundred fifty-six".