305433140 has 12 divisors (see below), whose sum is σ = 641409636. Its totient is φ = 122173248.

The previous prime is 305433131. The next prime is 305433199. The reversal of 305433140 is 41334503.

It can be written as a sum of positive squares in 2 ways, for example, as 35093776 + 270339364 = 5924^2 + 16442^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7635809 + ... + 7635848.

It is an arithmetic number, because the mean of its divisors is an integer number (53450803).

Almost surely, 2^305433140 is an apocalyptic number.

It is an amenable number.

305433140 is an abundant number, since it is smaller than the sum of its proper divisors (335976496).

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

305433140 is a wasteful number, since it uses less digits than its factorization.

305433140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15271666 (or 15271664 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 305433140 is about 17476.6455591455. The cubic root of 305433140 is about 673.4500440329.

Adding to 305433140 its reverse (41334503), we get a palindrome (346767643).

The spelling of 305433140 in words is "three hundred five million, four hundred thirty-three thousand, one hundred forty".