30253780 has 12 divisors (see below), whose sum is σ = 63532980. Its totient is φ = 12101504.

The previous prime is 30253747. The next prime is 30253801. The reversal of 30253780 is 8735203.

It can be written as a sum of positive squares in 2 ways, for example, as 5513104 + 24740676 = 2348^2 + 4974^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 756325 + ... + 756364.

It is an arithmetic number, because the mean of its divisors is an integer number (5294415).

Almost surely, 2^30253780 is an apocalyptic number.

It is an amenable number.

30253780 is an abundant number, since it is smaller than the sum of its proper divisors (33279200).

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

30253780 is a wasteful number, since it uses less digits than its factorization.

30253780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512698 (or 1512696 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 30253780 is about 5500.3436256292. The cubic root of 30253780 is about 311.5969620522.

Adding to 30253780 its reverse (8735203), we get a palindrome (38988983).

The spelling of 30253780 in words is "thirty million, two hundred fifty-three thousand, seven hundred eighty".