305094640 has 40 divisors (see below), whose sum is σ = 714954240. Its totient is φ = 121072896.

The previous prime is 305094623. The next prime is 305094649. The reversal of 305094640 is 46490503.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305094649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4855 + ... + 25174.

It is an arithmetic number, because the mean of its divisors is an integer number (17873856).

Almost surely, 2^305094640 is an apocalyptic number.

It is an amenable number.

305094640 is an abundant number, since it is smaller than the sum of its proper divisors (409859600).

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

305094640 is a wasteful number, since it uses less digits than its factorization.

305094640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30169 (or 30163 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 305094640 is about 17466.9585217347. The cubic root of 305094640 is about 673.2011656630.

The spelling of 305094640 in words is "three hundred five million, ninety-four thousand, six hundred forty".