40777636 has 12 divisors (see below), whose sum is σ = 72097228. Its totient is φ = 20178432.

The previous prime is 40777609. The next prime is 40777637. The reversal of 40777636 is 63677704.

It can be written as a sum of positive squares in 2 ways, for example, as 32993536 + 7784100 = 5744^2 + 2790^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40777637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52161 + ... + 52936.

Almost surely, 2^40777636 is an apocalyptic number.

It is an amenable number.

40777636 is a deficient number, since it is larger than the sum of its proper divisors (31319592).

40777636 is a wasteful number, since it uses less digits than its factorization.

40777636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105198 (or 105196 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 40.

The square root of 40777636 is about 6385.7369191034. The cubic root of 40777636 is about 344.1972120492.

The spelling of 40777636 in words is "forty million, seven hundred seventy-seven thousand, six hundred thirty-six".