4006978 has 8 divisors (see below), whose sum is σ = 6044220. Its totient is φ = 1992240.

The previous prime is 4006969. The next prime is 4006979. The reversal of 4006978 is 8796004.

It can be written as a sum of positive squares in 2 ways, for example, as 2812329 + 1194649 = 1677^2 + 1093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (4006979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5173 + ... + 5896.

Almost surely, 2^4006978 is an apocalyptic number.

4006978 is a deficient number, since it is larger than the sum of its proper divisors (2037242).

4006978 is a wasteful number, since it uses less digits than its factorization.

4006978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 4006978 is about 2001.7437398428. The cubic root of 4006978 is about 158.8323589432.

The spelling of 4006978 in words is "four million, six thousand, nine hundred seventy-eight".