3081305978 has 8 divisors (see below), whose sum is σ = 4649635872. Its totient is φ = 1531427356.

The previous prime is 3081305971. The next prime is 3081305987. The reversal of 3081305978 is 8795031803.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3081305971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4612400 + ... + 4613067.

It is an arithmetic number, because the mean of its divisors is an integer number (581204484).

Almost surely, 2^3081305978 is an apocalyptic number.

3081305978 is a deficient number, since it is larger than the sum of its proper divisors (1568329894).

3081305978 is a wasteful number, since it uses less digits than its factorization.

3081305978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9225636.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 3081305978 is about 55509.5125001112. The cubic root of 3081305978 is about 1455.1628837933.

The spelling of 3081305978 in words is "three billion, eighty-one million, three hundred five thousand, nine hundred seventy-eight".