3309909978 has 16 divisors (see below), whose sum is σ = 6667446240. Its totient is φ = 1095365616.

The previous prime is 3309909973. The next prime is 3309909997. The reversal of 3309909978 is 8799099033.

It is not an unprimeable number, because it can be changed into a prime (3309909973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1983525 + ... + 1985192.

It is an arithmetic number, because the mean of its divisors is an integer number (416715390).

Almost surely, 2^3309909978 is an apocalyptic number.

3309909978 is an abundant number, since it is smaller than the sum of its proper divisors (3357536262).

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

3309909978 is a wasteful number, since it uses less digits than its factorization.

3309909978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968861.

The product of its (nonzero) digits is 3306744, while the sum is 57.

The square root of 3309909978 is about 57531.8170928053. The cubic root of 3309909978 is about 1490.2943697181.

The spelling of 3309909978 in words is "three billion, three hundred nine million, nine hundred nine thousand, nine hundred seventy-eight".