40428836 has 48 divisors (see below), whose sum is σ = 85327872. Its totient is φ = 16394400.

The previous prime is 40428833. The next prime is 40428841. The reversal of 40428836 is 63882404.

It is a junction number, because it is equal to n+sod(n) for n = 40428796 and 40428805.

It is not an unprimeable number, because it can be changed into a prime (40428833) 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, 40301 + ... + 41291.

It is an arithmetic number, because the mean of its divisors is an integer number (1777664).

Almost surely, 2^40428836 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 40428836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42663936).

40428836 is an abundant number, since it is smaller than the sum of its proper divisors (44899036).

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

40428836 is a wasteful number, since it uses less digits than its factorization.

40428836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 40428836 is about 6358.3674005204. The cubic root of 40428836 is about 343.2130130018.

The spelling of 40428836 in words is "forty million, four hundred twenty-eight thousand, eight hundred thirty-six".