40085777 has 4 divisors (see below), whose sum is σ = 40120356. Its totient is φ = 40051200.

The previous prime is 40085767. The next prime is 40085807. The reversal of 40085777 is 77758004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10394176 + 29691601 = 3224^2 + 5449^2 .

It is a cyclic number.

It is not a de Polignac number, because 40085777 - 2⁶ = 40085713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40085777.

It is not an unprimeable number, because it can be changed into a prime (40085707) 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 3 ways as a sum of consecutive naturals, for example, 15488 + ... + 17889.

It is an arithmetic number, because the mean of its divisors is an integer number (10030089).

Almost surely, 2^40085777 is an apocalyptic number.

It is an amenable number.

40085777 is a deficient number, since it is larger than the sum of its proper divisors (34579).

40085777 is a wasteful number, since it uses less digits than its factorization.

40085777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34578.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 40085777 is about 6331.3329560212. The cubic root of 40085777 is about 342.2394758118.

The spelling of 40085777 in words is "forty million, eighty-five thousand, seven hundred seventy-seven".