3321309978 has 48 divisors (see below), whose sum is σ = 8379386496. Its totient is φ = 931039200.

The previous prime is 3321309977. The next prime is 3321310033. The reversal of 3321309978 is 8799031233.

3321309978 is a `hidden beast` number, since 332 + 1 + 309 + 9 + 7 + 8 = 666.

It is a super-2 number, since 2×3321309978² = 22062199939924720968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3321309977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241998 + ... + 255353.

It is an arithmetic number, because the mean of its divisors is an integer number (174570552).

Almost surely, 2^3321309978 is an apocalyptic number.

3321309978 is an abundant number, since it is smaller than the sum of its proper divisors (5058076518).

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

3321309978 is a wasteful number, since it uses less digits than its factorization.

3321309978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497419 (or 497416 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 3321309978 is about 57630.8075424941. The cubic root of 3321309978 is about 1492.0033676704.

The spelling of 3321309978 in words is "three billion, three hundred twenty-one million, three hundred nine thousand, nine hundred seventy-eight".