40778577 has 24 divisors (see below), whose sum is σ = 68887104. Its totient is φ = 22758624.

The previous prime is 40778539. The next prime is 40778581. The reversal of 40778577 is 77587704.

It is a happy number.

40778577 is a `hidden beast` number, since 4 + 0 + 7 + 78 + 577 = 666.

It is not a de Polignac number, because 40778577 - 2⁶ = 40778513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40778537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4818 + ... + 10235.

It is an arithmetic number, because the mean of its divisors is an integer number (2870296).

Almost surely, 2^40778577 is an apocalyptic number.

It is an amenable number.

40778577 is a deficient number, since it is larger than the sum of its proper divisors (28108527).

40778577 is a wasteful number, since it uses less digits than its factorization.

40778577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15109 (or 15106 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 45.

The square root of 40778577 is about 6385.8105985067. The cubic root of 40778577 is about 344.1998596368.

The spelling of 40778577 in words is "forty million, seven hundred seventy-eight thousand, five hundred seventy-seven".