306968240 has 20 divisors (see below), whose sum is σ = 713701344. Its totient is φ = 122787264.

The previous prime is 306968227. The next prime is 306968251. The reversal of 306968240 is 42869603.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 306968194 and 306968203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1918472 + ... + 1918631.

Almost surely, 2^306968240 is an apocalyptic number.

It is an amenable number.

306968240 is an abundant number, since it is smaller than the sum of its proper divisors (406733104).

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

306968240 is a wasteful number, since it uses less digits than its factorization.

306968240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837116 (or 3837110 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 306968240 is about 17520.5091250226. The cubic root of 306968240 is about 674.5764073004.

The spelling of 306968240 in words is "three hundred six million, nine hundred sixty-eight thousand, two hundred forty".