40705812 has 36 divisors (see below), whose sum is σ = 117595296. Its totient is φ = 11630160.

The previous prime is 40705793. The next prime is 40705813. The reversal of 40705812 is 21850704.

40705812 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 (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40705813) 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 11 ways as a sum of consecutive naturals, for example, 80514 + ... + 81017.

It is an arithmetic number, because the mean of its divisors is an integer number (3266536).

Almost surely, 2^40705812 is an apocalyptic number.

40705812 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

40705812 is an abundant number, since it is smaller than the sum of its proper divisors (76889484).

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

40705812 is a wasteful number, since it uses less digits than its factorization.

40705812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161548 (or 161543 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 40705812 is about 6380.1106573476. The cubic root of 40705812 is about 343.9950084908.

The spelling of 40705812 in words is "forty million, seven hundred five thousand, eight hundred twelve".