305740520 has 32 divisors (see below), whose sum is σ = 688434120. Its totient is φ = 122204160.

The previous prime is 305740489. The next prime is 305740549. The reversal of 305740520 is 25047503.

It can be written as a sum of positive squares in 4 ways, for example, as 151831684 + 153908836 = 12322^2 + 12406^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 305740520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81404 + ... + 85076.

Almost surely, 2^305740520 is an apocalyptic number.

It is an amenable number.

305740520 is an abundant number, since it is smaller than the sum of its proper divisors (382693600).

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

305740520 is a wasteful number, since it uses less digits than its factorization.

305740520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5765 (or 5761 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 305740520 is about 17485.4373694226. The cubic root of 305740520 is about 673.6758825168.

The spelling of 305740520 in words is "three hundred five million, seven hundred forty thousand, five hundred twenty".