306716540 has 96 divisors (see below), whose sum is σ = 716579136. Its totient is φ = 109578240.

The previous prime is 306716537. The next prime is 306716561. The reversal of 306716540 is 45617603.

It is a junction number, because it is equal to n+sod(n) for n = 306716497 and 306716506.

It is a congruent number.

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, 1316264 + ... + 1316496.

It is an arithmetic number, because the mean of its divisors is an integer number (7464366).

Almost surely, 2^306716540 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 306716540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358289568).

306716540 is an abundant number, since it is smaller than the sum of its proper divisors (409862596).

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

306716540 is a wasteful number, since it uses less digits than its factorization.

306716540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 306716540 is about 17513.3246415408. The cubic root of 306716540 is about 674.3919828902.

The spelling of 306716540 in words is "three hundred six million, seven hundred sixteen thousand, five hundred forty".