4020940 has 72 divisors (see below), whose sum is σ = 10744272. Its totient is φ = 1249920.

The previous prime is 4020923. The next prime is 4020949. The reversal of 4020940 is 490204.

It is not an unprimeable number, because it can be changed into a prime (4020949) 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 23 ways as a sum of consecutive naturals, for example, 10594 + ... + 10966.

It is an arithmetic number, because the mean of its divisors is an integer number (149226).

Almost surely, 2^4020940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4020940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5372136).

4020940 is an abundant number, since it is smaller than the sum of its proper divisors (6723332).

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

4020940 is a wasteful number, since it uses less digits than its factorization.

4020940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 4020940 is about 2005.2281665686. The cubic root of 4020940 is about 159.0166247137.

The spelling of 4020940 in words is "four million, twenty thousand, nine hundred forty".