306742156 has 90 divisors (see below), whose sum is σ = 675657220. Its totient is φ = 121504320.

The previous prime is 306742153. The next prime is 306742157. The reversal of 306742156 is 651247603.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (306742153) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 7481496 + ... + 7481536.

Almost surely, 2^306742156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 306742156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337828610).

306742156 is an abundant number, since it is smaller than the sum of its proper divisors (368915064).

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

306742156 is an equidigital number, since it uses as much as digits as its factorization.

306742156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 306742156 is about 17514.0559551464. The cubic root of 306742156 is about 674.4107567328.

Adding to 306742156 its reverse (651247603), we get a palindrome (957989759).

The spelling of 306742156 in words is "three hundred six million, seven hundred forty-two thousand, one hundred fifty-six".