4031978 has 8 divisors (see below), whose sum is σ = 6147300. Its totient is φ = 1982880.

The previous prime is 4031977. The next prime is 4031987. The reversal of 4031978 is 8791304.

It can be written as a sum of positive squares in 2 ways, for example, as 2486929 + 1545049 = 1577^2 + 1243^2 .

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 (4031977) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16403 + ... + 16646.

Almost surely, 2^4031978 is an apocalyptic number.

4031978 is a deficient number, since it is larger than the sum of its proper divisors (2115322).

4031978 is a wasteful number, since it uses less digits than its factorization.

4031978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33112.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 4031978 is about 2007.9785855432. The cubic root of 4031978 is about 159.1619988337.

The spelling of 4031978 in words is "four million, thirty-one thousand, nine hundred seventy-eight".