40026840 has 128 divisors (see below), whose sum is σ = 145359360. Its totient is φ = 8607744.

The previous prime is 40026829. The next prime is 40026841. The reversal of 40026840 is 4862004.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40026840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40026841) 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 31 ways as a sum of consecutive naturals, for example, 12879 + ... + 15681.

It is an arithmetic number, because the mean of its divisors is an integer number (1135620).

Almost surely, 2^40026840 is an apocalyptic number.

40026840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40026840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72679680).

40026840 is an abundant number, since it is smaller than the sum of its proper divisors (105332520).

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

40026840 is a wasteful number, since it uses less digits than its factorization.

40026840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841 (or 2837 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 40026840 is about 6326.6768528193. The cubic root of 40026840 is about 342.0716651568.

Adding to 40026840 its reverse (4862004), we get a palindrome (44888844).

The spelling of 40026840 in words is "forty million, twenty-six thousand, eight hundred forty".