306940 has 24 divisors (see below), whose sum is σ = 655200. Its totient is φ = 120768.

The previous prime is 306919. The next prime is 306941. The reversal of 306940 is 49603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306941) by changing a digit.

306940 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1986 + ... + 2134.

It is an arithmetic number, because the mean of its divisors is an integer number (27300).

2³⁰⁶⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

306940 is an abundant number, since it is smaller than the sum of its proper divisors (348260).

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

306940 is a wasteful number, since it uses less digits than its factorization.

306940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 306940 is about 554.0216602264. The cubic root of 306940 is about 67.4555720446.

It can be divided in two parts, 3069 and 40, that multiplied together give a triangular number (122760 = T₄₉₅).

The spelling of 306940 in words is "three hundred six thousand, nine hundred forty".