305061020 has 96 divisors (see below), whose sum is σ = 722082816. Its totient is φ = 107308800.

The previous prime is 305061019. The next prime is 305061047. The reversal of 305061020 is 20160503.

It is a self number, because there is not a number n which added to its sum of digits gives 305061020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1685330 + ... + 1685510.

It is an arithmetic number, because the mean of its divisors is an integer number (7521696).

Almost surely, 2^305061020 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 305061020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361041408).

305061020 is an abundant number, since it is smaller than the sum of its proper divisors (417021796).

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

305061020 is a wasteful number, since it uses less digits than its factorization.

305061020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 305061020 is about 17465.9961067212. The cubic root of 305061020 is about 673.1764368831.

The spelling of 305061020 in words is "three hundred five million, sixty-one thousand, twenty".