40170440 has 32 divisors (see below), whose sum is σ = 91628280. Its totient is φ = 15846912.

The previous prime is 40170437. The next prime is 40170457. The reversal of 40170440 is 4407104.

40170440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 22714756 + 17455684 = 4766^2 + 4178^2 .

It is a super-2 number, since 2×40170440² = 3227328499587200, which contains 22 as substring.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3959 + ... + 9798.

Almost surely, 2^40170440 is an apocalyptic number.

40170440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40170440 is an abundant number, since it is smaller than the sum of its proper divisors (51457840).

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

40170440 is a wasteful number, since it uses less digits than its factorization.

40170440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13841 (or 13837 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 40170440 is about 6338.0154622721. The cubic root of 40170440 is about 342.4802482083.

Adding to 40170440 its reverse (4407104), we get a palindrome (44577544).

The spelling of 40170440 in words is "forty million, one hundred seventy thousand, four hundred forty".