305242100 has 18 divisors (see below), whose sum is σ = 662375574. Its totient is φ = 122096800.

The previous prime is 305242097. The next prime is 305242129. The reversal of 305242100 is 1242503.

It can be written as a sum of positive squares in 3 ways, for example, as 95687524 + 209554576 = 9782^2 + 14476^2 .

It is a super-2 number, since 2×305242100² = 186345479224820000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1526111 + ... + 1526310.

It is an arithmetic number, because the mean of its divisors is an integer number (36798643).

Almost surely, 2^305242100 is an apocalyptic number.

It is an amenable number.

305242100 is an abundant number, since it is smaller than the sum of its proper divisors (357133474).

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

305242100 is a wasteful number, since it uses less digits than its factorization.

305242100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052435 (or 3052428 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 305242100 is about 17471.1791244896. The cubic root of 305242100 is about 673.3096066098.

Adding to 305242100 its reverse (1242503), we get a palindrome (306484603).

The spelling of 305242100 in words is "three hundred five million, two hundred forty-two thousand, one hundred".