40244420 has 12 divisors (see below), whose sum is σ = 84513324. Its totient is φ = 16097760.

The previous prime is 40244387. The next prime is 40244441. The reversal of 40244420 is 2444204.

It can be written as a sum of positive squares in 2 ways, for example, as 21977344 + 18267076 = 4688^2 + 4274^2 .

It is a super-2 number, since 2×40244420² = 3239226682272800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2012221 = 40244420 / (4 + 0 + 2 + 4 + 4 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 40244392 and 40244401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006091 + ... + 1006130.

It is an arithmetic number, because the mean of its divisors is an integer number (7042777).

Almost surely, 2^40244420 is an apocalyptic number.

It is an amenable number.

40244420 is an abundant number, since it is smaller than the sum of its proper divisors (44268904).

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

40244420 is a wasteful number, since it uses less digits than its factorization.

40244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012230 (or 2012228 counting only the distinct ones).

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

The square root of 40244420 is about 6343.8489893755. The cubic root of 40244420 is about 342.6903625018.

Adding to 40244420 its reverse (2444204), we get a palindrome (42688624).

The spelling of 40244420 in words is "forty million, two hundred forty-four thousand, four hundred twenty".