306147940 has 96 divisors (see below), whose sum is σ = 791691264. Its totient is φ = 97130880.

The previous prime is 306147937. The next prime is 306147967. The reversal of 306147940 is 49741603.

It is a happy number.

It is a super-2 number, since 2×306147940² = 187453122332487200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 306147896 and 306147905.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98287 + ... + 101353.

It is an arithmetic number, because the mean of its divisors is an integer number (8246784).

Almost surely, 2^306147940 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 306147940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395845632).

306147940 is an abundant number, since it is smaller than the sum of its proper divisors (485543324).

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

306147940 is a wasteful number, since it uses less digits than its factorization.

306147940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137 (or 3135 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 306147940 is about 17497.0837570151. The cubic root of 306147940 is about 673.9749893128.

The spelling of 306147940 in words is "three hundred six million, one hundred forty-seven thousand, nine hundred forty".