306156 has 24 divisors (see below), whose sum is σ = 738304. Its totient is φ = 98640.

The previous prime is 306149. The next prime is 306157. The reversal of 306156 is 651603.

It is not an unprimeable number, because it can be changed into a prime (306157) by changing a digit.

306156 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 40 + ... + 783.

2³⁰⁶¹⁵⁶ is an apocalyptic number.

It is an amenable number.

306156 is an abundant number, since it is smaller than the sum of its proper divisors (432148).

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

306156 is a wasteful number, since it uses less digits than its factorization.

306156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 306156 is about 553.3136542685. The cubic root of 306156 is about 67.3980903872.

Adding to 306156 its reverse (651603), we get a palindrome (957759).

The spelling of 306156 in words is "three hundred six thousand, one hundred fifty-six".