4020026440 has 16 divisors (see below), whose sum is σ = 9045059580. Its totient is φ = 1608010560.

The previous prime is 4020026389. The next prime is 4020026443. The reversal of 4020026440 is 446200204.

It can be written as a sum of positive squares in 2 ways, for example, as 3619466244 + 400560196 = 60162^2 + 20014^2 .

It is a super-2 number, since 2×4020026440² = 32321225156598147200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4020026443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50250291 + ... + 50250370.

Almost surely, 2^4020026440 is an apocalyptic number.

4020026440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4020026440 is an abundant number, since it is smaller than the sum of its proper divisors (5025033140).

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

4020026440 is a wasteful number, since it uses less digits than its factorization.

4020026440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100500672 (or 100500668 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4020026440 is about 63403.6784421850. The cubic root of 4020026440 is about 1590.0458091044.

Adding to 4020026440 its reverse (446200204), we get a palindrome (4466226644).

The spelling of 4020026440 in words is "four billion, twenty million, twenty-six thousand, four hundred forty".