4020388 has 12 divisors (see below), whose sum is σ = 7151452. Its totient is φ = 1977120.

The previous prime is 4020361. The next prime is 4020407. The reversal of 4020388 is 8830204.

4020388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 605284 + 3415104 = 778^2 + 1848^2 .

It is an unprimeable number.

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, 7995 + ... + 8482.

Almost surely, 2^4020388 is an apocalyptic number.

It is an amenable number.

4020388 is a deficient number, since it is larger than the sum of its proper divisors (3131064).

4020388 is a wasteful number, since it uses less digits than its factorization.

4020388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16542 (or 16540 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 4020388 is about 2005.0905216473. The cubic root of 4020388 is about 159.0093477093.

The spelling of 4020388 in words is "four million, twenty thousand, three hundred eighty-eight".