306780020 has 24 divisors (see below), whose sum is σ = 644716800. Its totient is φ = 122620832.

The previous prime is 306780007. The next prime is 306780037. The reversal of 306780020 is 20087603.

It is a super-2 number, since 2×306780020² = 188227961342400800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26261 + ... + 36099.

It is an arithmetic number, because the mean of its divisors is an integer number (26863200).

Almost surely, 2^306780020 is an apocalyptic number.

It is an amenable number.

306780020 is an abundant number, since it is smaller than the sum of its proper divisors (337936780).

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

306780020 is a wasteful number, since it uses less digits than its factorization.

306780020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11407 (or 11405 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 306780020 is about 17515.1368821371. The cubic root of 306780020 is about 674.4385051612.

The spelling of 306780020 in words is "three hundred six million, seven hundred eighty thousand, twenty".