40557447 has 18 divisors (see below), whose sum is σ = 68148288. Its totient is φ = 23175432.

The previous prime is 40557443. The next prime is 40557449. The reversal of 40557447 is 74475504.

40557447 is a `hidden beast` number, since 40 + 5 + 574 + 47 = 666.

It is not a de Polignac number, because 40557447 - 2² = 40557443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40557443) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45543 + ... + 46424.

It is an arithmetic number, because the mean of its divisors is an integer number (3786016).

Almost surely, 2^40557447 is an apocalyptic number.

40557447 is a deficient number, since it is larger than the sum of its proper divisors (27590841).

40557447 is a wasteful number, since it uses less digits than its factorization.

40557447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91987 (or 91977 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 40557447 is about 6368.4728938734. The cubic root of 40557447 is about 343.5765674106.

The spelling of 40557447 in words is "forty million, five hundred fifty-seven thousand, four hundred forty-seven".