40778085 has 32 divisors (see below), whose sum is σ = 69120000. Its totient is φ = 20471616.

The previous prime is 40778083. The next prime is 40778117. The reversal of 40778085 is 58087704.

It is not a de Polignac number, because 40778085 - 2¹ = 40778083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40778083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56356 + ... + 57074.

It is an arithmetic number, because the mean of its divisors is an integer number (2160000).

Almost surely, 2^40778085 is an apocalyptic number.

It is an amenable number.

40778085 is a deficient number, since it is larger than the sum of its proper divisors (28341915).

40778085 is a wasteful number, since it uses less digits than its factorization.

40778085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 40778085 is about 6385.7720754816. The cubic root of 40778085 is about 344.1984753559.

The spelling of 40778085 in words is "forty million, seven hundred seventy-eight thousand, eighty-five".