40286440 has 16 divisors (see below), whose sum is σ = 90644580. Its totient is φ = 16114560.

The previous prime is 40286429. The next prime is 40286443. The reversal of 40286440 is 4468204.

40286440 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 2 ways, for example, as 36893476 + 3392964 = 6074^2 + 1842^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40286399 and 40286408.

It is not an unprimeable number, because it can be changed into a prime (40286443) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 503541 + ... + 503620.

Almost surely, 2^40286440 is an apocalyptic number.

40286440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40286440 is an abundant number, since it is smaller than the sum of its proper divisors (50358140).

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

40286440 is a wasteful number, since it uses less digits than its factorization.

40286440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007172 (or 1007168 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 40286440 is about 6347.1599948323. The cubic root of 40286440 is about 342.8095909581.

The spelling of 40286440 in words is "forty million, two hundred eighty-six thousand, four hundred forty".