40406436 has 36 divisors (see below), whose sum is σ = 116730432. Its totient is φ = 11544624.

The previous prime is 40406383. The next prime is 40406437. The reversal of 40406436 is 63460404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (40406437) 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 11 ways as a sum of consecutive naturals, for example, 79920 + ... + 80423.

It is an arithmetic number, because the mean of its divisors is an integer number (3242512).

Almost surely, 2^40406436 is an apocalyptic number.

It is an amenable number.

40406436 is an abundant number, since it is smaller than the sum of its proper divisors (76323996).

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

40406436 is a wasteful number, since it uses less digits than its factorization.

40406436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160360 (or 160355 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 40406436 is about 6356.6056980121. The cubic root of 40406436 is about 343.1496144266.

The spelling of 40406436 in words is "forty million, four hundred six thousand, four hundred thirty-six".