2309631978 has 32 divisors (see below), whose sum is σ = 4789036800. Its totient is φ = 741698496.

The previous prime is 2309631977. The next prime is 2309632021. The reversal of 2309631978 is 8791369032.

It is not an unprimeable number, because it can be changed into a prime (2309631977) 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 15 ways as a sum of consecutive naturals, for example, 66228 + ... + 94896.

It is an arithmetic number, because the mean of its divisors is an integer number (149657400).

Almost surely, 2^2309631978 is an apocalyptic number.

2309631978 is an abundant number, since it is smaller than the sum of its proper divisors (2479404822).

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

2309631978 is a wasteful number, since it uses less digits than its factorization.

2309631978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29166.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 2309631978 is about 48058.6306296798. The cubic root of 2309631978 is about 1321.8462033553.

The spelling of 2309631978 in words is "two billion, three hundred nine million, six hundred thirty-one thousand, nine hundred seventy-eight".