306780 has 24 divisors (see below), whose sum is σ = 859152. Its totient is φ = 81792.

The previous prime is 306763. The next prime is 306781. The reversal of 306780 is 87603.

306780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×306780² = 188227936800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 306780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2497 + ... + 2616.

It is an arithmetic number, because the mean of its divisors is an integer number (35798).

2³⁰⁶⁷⁸⁰ is an apocalyptic number.

306780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

306780 is an abundant number, since it is smaller than the sum of its proper divisors (552372).

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

306780 is a wasteful number, since it uses less digits than its factorization.

306780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125 (or 5123 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 306780 is about 553.8772427172. The cubic root of 306780 is about 67.4438490505.

The spelling of 306780 in words is "three hundred six thousand, seven hundred eighty".