40429040 has 40 divisors (see below), whose sum is σ = 95202240. Its totient is φ = 15964416.

The previous prime is 40429021. The next prime is 40429063. The reversal of 40429040 is 4092404.

It is a happy number.

40429040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 40428997 and 40429015.

It is a congruent number.

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, 3122 + ... + 9518.

It is an arithmetic number, because the mean of its divisors is an integer number (2380056).

Almost surely, 2^40429040 is an apocalyptic number.

40429040 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 40429040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47601120).

40429040 is an abundant number, since it is smaller than the sum of its proper divisors (54773200).

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

40429040 is a wasteful number, since it uses less digits than its factorization.

40429040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6489 (or 6483 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40429040 is about 6358.3834423539. The cubic root of 40429040 is about 343.2135902740.

The spelling of 40429040 in words is "forty million, four hundred twenty-nine thousand, forty".