40819745 has 8 divisors (see below), whose sum is σ = 49074984. Its totient is φ = 32594944.

The previous prime is 40819741. The next prime is 40819747. The reversal of 40819745 is 54791804.

40819745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7376656 + 33443089 = 2716^2 + 5783^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40819745 - 2² = 40819741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40819699 and 40819708.

It is not an unprimeable number, because it can be changed into a prime (40819741) 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 7 ways as a sum of consecutive naturals, for example, 4544 + ... + 10113.

It is an arithmetic number, because the mean of its divisors is an integer number (6134373).

Almost surely, 2^40819745 is an apocalyptic number.

It is an amenable number.

40819745 is a deficient number, since it is larger than the sum of its proper divisors (8255239).

40819745 is a wasteful number, since it uses less digits than its factorization.

40819745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15219.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 40819745 is about 6389.0331819454. The cubic root of 40819745 is about 344.3156496348.

The spelling of 40819745 in words is "forty million, eight hundred nineteen thousand, seven hundred forty-five".