305696040 has 128 divisors (see below), whose sum is σ = 1045820160. Its totient is φ = 70815744.

The previous prime is 305696029. The next prime is 305696063. The reversal of 305696040 is 40696503.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 305695992 and 305696010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20757 + ... + 32283.

It is an arithmetic number, because the mean of its divisors is an integer number (8170470).

Almost surely, 2^305696040 is an apocalyptic number.

305696040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305696040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522910080).

305696040 is an abundant number, since it is smaller than the sum of its proper divisors (740124120).

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

305696040 is a wasteful number, since it uses less digits than its factorization.

305696040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11571 (or 11567 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 305696040 is about 17484.1654075909. The cubic root of 305696040 is about 673.6432115049.

The spelling of 305696040 in words is "three hundred five million, six hundred ninety-six thousand, forty".