40244020 has 48 divisors (see below), whose sum is σ = 89268480. Its totient is φ = 15209216.

The previous prime is 40244011. The next prime is 40244021. The reversal of 40244020 is 2044204.

It is a super-2 number, since 2×40244020² = 3239162291520800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40243985 and 40244003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40244021) 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 15 ways as a sum of consecutive naturals, for example, 40449 + ... + 41431.

It is an arithmetic number, because the mean of its divisors is an integer number (1859760).

Almost surely, 2^40244020 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 40244020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44634240).

40244020 is an abundant number, since it is smaller than the sum of its proper divisors (49024460).

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

40244020 is a wasteful number, since it uses less digits than its factorization.

40244020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40244020 is about 6343.8174626955. The cubic root of 40244020 is about 342.6892271345.

Adding to 40244020 its reverse (2044204), we get a palindrome (42288224).

The spelling of 40244020 in words is "forty million, two hundred forty-four thousand, twenty".