4002078 has 8 divisors (see below), whose sum is σ = 8004168. Its totient is φ = 1334024.

The previous prime is 4002077. The next prime is 4002101. The reversal of 4002078 is 8702004.

It is a happy number.

4002078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

4002078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002077) 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 3 ways as a sum of consecutive naturals, for example, 333501 + ... + 333512.

It is an arithmetic number, because the mean of its divisors is an integer number (1000521).

Almost surely, 2^4002078 is an apocalyptic number.

4002078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4002078 is a wasteful number, since it uses less digits than its factorization.

4002078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667018.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 4002078 is about 2000.5194325475. The cubic root of 4002078 is about 158.7675889330.

The spelling of 4002078 in words is "four million, two thousand, seventy-eight".