30125780 has 24 divisors (see below), whose sum is σ = 65446920. Its totient is φ = 11634560.

The previous prime is 30125761. The next prime is 30125789. The reversal of 30125780 is 8752103.

It can be written as a sum of positive squares in 4 ways, for example, as 29584 + 30096196 = 172^2 + 5486^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30125789) 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, 25391 + ... + 26550.

It is an arithmetic number, because the mean of its divisors is an integer number (2726955).

Almost surely, 2^30125780 is an apocalyptic number.

It is an amenable number.

30125780 is an abundant number, since it is smaller than the sum of its proper divisors (35321140).

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

30125780 is a wasteful number, since it uses less digits than its factorization.

30125780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51979 (or 51977 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 30125780 is about 5488.6956556180. The cubic root of 30125780 is about 311.1568981175.

Adding to 30125780 its reverse (8752103), we get a palindrome (38877883).

The spelling of 30125780 in words is "thirty million, one hundred twenty-five thousand, seven hundred eighty".