4020442178 has 4 divisors (see below), whose sum is σ = 6030663270. Its totient is φ = 2010221088.

The previous prime is 4020442177. The next prime is 4020442201. The reversal of 4020442178 is 8712440204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2785411729 + 1235030449 = 52777^2 + 35143^2 .

It is not an unprimeable number, because it can be changed into a prime (4020442171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005110543 + ... + 1005110546.

Almost surely, 2^4020442178 is an apocalyptic number.

4020442178 is a deficient number, since it is larger than the sum of its proper divisors (2010221092).

4020442178 is a wasteful number, since it uses less digits than its factorization.

4020442178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010221091.

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 4020442178 is about 63406.9568580609. The cubic root of 4020442178 is about 1590.1006196625.

The spelling of 4020442178 in words is "four billion, twenty million, four hundred forty-two thousand, one hundred seventy-eight".