306740 has 36 divisors (see below), whose sum is σ = 751716. Its totient is φ = 104832.

The previous prime is 306739. The next prime is 306749. The reversal of 306740 is 47603.

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 268324 = 196^2 + 518^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 824 + ... + 1136.

It is an arithmetic number, because the mean of its divisors is an integer number (20881).

2³⁰⁶⁷⁴⁰ 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 306740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375858).

306740 is an abundant number, since it is smaller than the sum of its proper divisors (444976).

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

306740 is a wasteful number, since it uses less digits than its factorization.

306740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 306740 is about 553.8411324559. The cubic root of 306740 is about 67.4409176651.

The spelling of 306740 in words is "three hundred six thousand, seven hundred forty".