30123700 has 18 divisors (see below), whose sum is σ = 65368646. Its totient is φ = 12049440.

The previous prime is 30123679. The next prime is 30123701. The reversal of 30123700 is 732103.

It can be written as a sum of positive squares in 3 ways, for example, as 224676 + 29899024 = 474^2 + 5468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30123701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150519 + ... + 150718.

Almost surely, 2^30123700 is an apocalyptic number.

It is an amenable number.

30123700 is an abundant number, since it is smaller than the sum of its proper divisors (35244946).

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

30123700 is a wasteful number, since it uses less digits than its factorization.

30123700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301251 (or 301244 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 30123700 is about 5488.5061719925. The cubic root of 30123700 is about 311.1497367953.

Adding to 30123700 its reverse (732103), we get a palindrome (30855803).

The spelling of 30123700 in words is "thirty million, one hundred twenty-three thousand, seven hundred".