40556644 has 12 divisors (see below), whose sum is σ = 71093484. Its totient is φ = 20244224.

The previous prime is 40556623. The next prime is 40556647. The reversal of 40556644 is 44665504.

It can be written as a sum of positive squares in 2 ways, for example, as 21529600 + 19027044 = 4640^2 + 4362^2 .

It is not an unprimeable number, because it can be changed into a prime (40556647) 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, 5749 + ... + 10684.

It is an arithmetic number, because the mean of its divisors is an integer number (5924457).

Almost surely, 2^40556644 is an apocalyptic number.

It is an amenable number.

40556644 is a deficient number, since it is larger than the sum of its proper divisors (30536840).

40556644 is a wasteful number, since it uses less digits than its factorization.

40556644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17054 (or 17052 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 40556644 is about 6368.4098486200. The cubic root of 40556644 is about 343.5742998961.

The spelling of 40556644 in words is "forty million, five hundred fifty-six thousand, six hundred forty-four".