309801996 has 120 divisors (see below), whose sum is σ = 965986560. Its totient is φ = 84652128.

The previous prime is 309801967. The next prime is 309802091. The reversal of 309801996 is 699108903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 49195 + ... + 55133.

It is an arithmetic number, because the mean of its divisors is an integer number (8049888).

Almost surely, 2^309801996 is an apocalyptic number.

309801996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309801996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482993280).

309801996 is an abundant number, since it is smaller than the sum of its proper divisors (656184564).

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

309801996 is a wasteful number, since it uses less digits than its factorization.

309801996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985 (or 5974 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 309801996 is about 17601.1930277467. The cubic root of 309801996 is about 676.6458208477.

The spelling of 309801996 in words is "three hundred nine million, eight hundred one thousand, nine hundred ninety-six".