306668840 has 32 divisors (see below), whose sum is σ = 690720480. Its totient is φ = 122540352.

The previous prime is 306668837. The next prime is 306668861. The reversal of 306668840 is 48866603.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41507 + ... + 48333.

It is an arithmetic number, because the mean of its divisors is an integer number (21585015).

Almost surely, 2^306668840 is an apocalyptic number.

It is an amenable number.

306668840 is an abundant number, since it is smaller than the sum of its proper divisors (384051640).

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

306668840 is a wasteful number, since it uses less digits than its factorization.

306668840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7961 (or 7957 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 306668840 is about 17511.9627683478. The cubic root of 306668840 is about 674.3570210051.

The spelling of 306668840 in words is "three hundred six million, six hundred sixty-eight thousand, eight hundred forty".