40905396 has 54 divisors (see below), whose sum is σ = 120286530. Its totient is φ = 11686752.

The previous prime is 40905391. The next prime is 40905407. The reversal of 40905396 is 69350904.

It can be written as a sum of positive squares in only one way, i.e., 35569296 + 5336100 = 5964^2 + 2310^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40905396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40905391) 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 17 ways as a sum of consecutive naturals, for example, 9831 + ... + 13358.

Almost surely, 2^40905396 is an apocalyptic number.

It is an amenable number.

40905396 is an abundant number, since it is smaller than the sum of its proper divisors (79381134).

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

40905396 is a wasteful number, since it uses less digits than its factorization.

40905396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23213 (or 23201 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 40905396 is about 6395.7326398154. The cubic root of 40905396 is about 344.5563042249.

The spelling of 40905396 in words is "forty million, nine hundred five thousand, three hundred ninety-six".