40778057 has 4 divisors (see below), whose sum is σ = 42551040. Its totient is φ = 39005076.

The previous prime is 40778039. The next prime is 40778063. The reversal of 40778057 is 75087704.

40778057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40778057 - 2⁶ = 40777993 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 40778057.

It is not an unprimeable number, because it can be changed into a prime (40778077) 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 3 ways as a sum of consecutive naturals, for example, 886457 + ... + 886502.

It is an arithmetic number, because the mean of its divisors is an integer number (10637760).

Almost surely, 2^40778057 is an apocalyptic number.

It is an amenable number.

40778057 is a deficient number, since it is larger than the sum of its proper divisors (1772983).

40778057 is a wasteful number, since it uses less digits than its factorization.

40778057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772982.

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

The square root of 40778057 is about 6385.7698831073. The cubic root of 40778057 is about 344.1983965754.

The spelling of 40778057 in words is "forty million, seven hundred seventy-eight thousand, fifty-seven".