305350640 has 80 divisors (see below), whose sum is σ = 833345472. Its totient is φ = 101855232.

The previous prime is 305350601. The next prime is 305350663. The reversal of 305350640 is 46053503.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13352 + ... + 28088.

Almost surely, 2^305350640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305350640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416672736).

305350640 is an abundant number, since it is smaller than the sum of its proper divisors (527994832).

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

305350640 is a wasteful number, since it uses less digits than its factorization.

305350640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14794 (or 14788 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 305350640 is about 17474.2851069793. The cubic root of 305350640 is about 673.3894037765.

The spelling of 305350640 in words is "three hundred five million, three hundred fifty thousand, six hundred forty".