306132140 has 12 divisors (see below), whose sum is σ = 642877536. Its totient is φ = 122452848.

The previous prime is 306132119. The next prime is 306132157. The reversal of 306132140 is 41231603.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 15306607 = 306132140 / (3 + 0 + 6 + 1 + 3 + 2 + 1 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7653284 + ... + 7653323.

It is an arithmetic number, because the mean of its divisors is an integer number (53573128).

Almost surely, 2^306132140 is an apocalyptic number.

It is an amenable number.

306132140 is an abundant number, since it is smaller than the sum of its proper divisors (336745396).

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

306132140 is a wasteful number, since it uses less digits than its factorization.

306132140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15306616 (or 15306614 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 306132140 is about 17496.6322473784. The cubic root of 306132140 is about 673.9633947135.

Adding to 306132140 its reverse (41231603), we get a palindrome (347363743).

The spelling of 306132140 in words is "three hundred six million, one hundred thirty-two thousand, one hundred forty".