40420020440 has 32 divisors (see below), whose sum is σ = 90952001280. Its totient is φ = 16166771712.

The previous prime is 40420020427. The next prime is 40420020463. The reversal of 40420020440 is 4402002404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636617 + ... + 697223.

It is an arithmetic number, because the mean of its divisors is an integer number (2842250040).

Almost surely, 2^40420020440 is an apocalyptic number.

40420020440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40420020440 is an abundant number, since it is smaller than the sum of its proper divisors (50531980840).

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

40420020440 is a wasteful number, since it uses less digits than its factorization.

40420020440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77291 (or 77287 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40420020440 its reverse (4402002404), we get a palindrome (44822022844).

The spelling of 40420020440 in words is "forty billion, four hundred twenty million, twenty thousand, four hundred forty".