40647772 has 18 divisors (see below), whose sum is σ = 78189104. Its totient is φ = 18476040.

The previous prime is 40647749. The next prime is 40647773. The reversal of 40647772 is 27774604.

It is a happy number.

40647772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40647773) 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 5 ways as a sum of consecutive naturals, for example, 41508 + ... + 42475.

Almost surely, 2^40647772 is an apocalyptic number.

It is an amenable number.

40647772 is a deficient number, since it is larger than the sum of its proper divisors (37541332).

40647772 is a wasteful number, since it uses less digits than its factorization.

40647772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84009 (or 83996 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 37.

The square root of 40647772 is about 6375.5605243774. The cubic root of 40647772 is about 343.8314367056.

The spelling of 40647772 in words is "forty million, six hundred forty-seven thousand, seven hundred seventy-two".