306534040 has 64 divisors (see below), whose sum is σ = 709974720. Its totient is φ = 119040000.

The previous prime is 306534037. The next prime is 306534061. The reversal of 306534040 is 40435603.

It is a junction number, because it is equal to n+sod(n) for n = 306533996 and 306534014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509740 + ... + 510340.

It is an arithmetic number, because the mean of its divisors is an integer number (11093355).

Almost surely, 2^306534040 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 306534040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354987360).

306534040 is an abundant number, since it is smaller than the sum of its proper divisors (403440680).

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

306534040 is a wasteful number, since it uses less digits than its factorization.

306534040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 306534040 is about 17508.1135477241. The cubic root of 306534040 is about 674.2581992609.

Adding to 306534040 its reverse (40435603), we get a palindrome (346969643).

The spelling of 306534040 in words is "three hundred six million, five hundred thirty-four thousand, forty".