305985240 has 96 divisors (see below), whose sum is σ = 1084870800. Its totient is φ = 74177280.

The previous prime is 305985233. The next prime is 305985263. The reversal of 305985240 is 42589503.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 305985195 and 305985204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34675 + ... + 42594.

Almost surely, 2^305985240 is an apocalyptic number.

305985240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

305985240 is an abundant number, since it is smaller than the sum of its proper divisors (778885560).

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

305985240 is a wasteful number, since it uses less digits than its factorization.

305985240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77297 (or 77290 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 305985240 is about 17492.4337929289. The cubic root of 305985240 is about 673.8555751915.

The spelling of 305985240 in words is "three hundred five million, nine hundred eighty-five thousand, two hundred forty".