2393978 has 16 divisors (see below), whose sum is σ = 3805056. Its totient is φ = 1127280.

The previous prime is 2393971. The next prime is 2393987. The reversal of 2393978 is 8793932.

2393978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2393978² = 11462261328968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2393971) 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 7 ways as a sum of consecutive naturals, for example, 2900 + ... + 3632.

It is an arithmetic number, because the mean of its divisors is an integer number (237816).

2^2393978 is an apocalyptic number.

2393978 is a deficient number, since it is larger than the sum of its proper divisors (1411078).

2393978 is a wasteful number, since it uses less digits than its factorization.

2393978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its digits is 81648, while the sum is 41.

The square root of 2393978 is about 1547.2485256093. The cubic root of 2393978 is about 133.7745149695.

The spelling of 2393978 in words is "two million, three hundred ninety-three thousand, nine hundred seventy-eight".