305855240 has 32 divisors (see below), whose sum is σ = 693209880. Its totient is φ = 121446912.

The previous prime is 305855213. The next prime is 305855287. The reversal of 305855240 is 42558503.

It can be written as a sum of positive squares in 4 ways, for example, as 267191716 + 38663524 = 16346^2 + 6218^2 .

It is a junction number, because it is equal to n+sod(n) for n = 305855197 and 305855206.

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, 22427 + ... + 33386.

Almost surely, 2^305855240 is an apocalyptic number.

It is an amenable number.

305855240 is an abundant number, since it is smaller than the sum of its proper divisors (387354640).

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

305855240 is a wasteful number, since it uses less digits than its factorization.

305855240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55961 (or 55957 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 305855240 is about 17488.7175058665. The cubic root of 305855240 is about 673.7601308996.

The spelling of 305855240 in words is "three hundred five million, eight hundred fifty-five thousand, two hundred forty".