40921544 has 8 divisors (see below), whose sum is σ = 76727910. Its totient is φ = 20460768.

The previous prime is 40921541. The next prime is 40921549. The reversal of 40921544 is 44512904.

It can be written as a sum of positive squares in only one way, i.e., 33292900 + 7628644 = 5770^2 + 2762^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (40921541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2557589 + ... + 2557604.

Almost surely, 2^40921544 is an apocalyptic number.

It is an amenable number.

40921544 is a deficient number, since it is larger than the sum of its proper divisors (35806366).

40921544 is a wasteful number, since it uses less digits than its factorization.

40921544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5115199 (or 5115195 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 40921544 is about 6396.9949194915. The cubic root of 40921544 is about 344.6016377975.

The spelling of 40921544 in words is "forty million, nine hundred twenty-one thousand, five hundred forty-four".