2307978 has 12 divisors (see below), whose sum is σ = 5000658. Its totient is φ = 769320.

The previous prime is 2307973. The next prime is 2307979. The reversal of 2307978 is 8797032.

2307978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1979649 + 328329 = 1407^2 + 573^2 .

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (2307973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64093 + ... + 64128.

2^2307978 is an apocalyptic number.

2307978 is an abundant number, since it is smaller than the sum of its proper divisors (2692680).

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

2307978 is a wasteful number, since it uses less digits than its factorization.

2307978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128229 (or 128226 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2307978 is about 1519.2030805656. The cubic root of 2307978 is about 132.1530593674.

The spelling of 2307978 in words is "two million, three hundred seven thousand, nine hundred seventy-eight".