40921644 has 12 divisors (see below), whose sum is σ = 95483864. Its totient is φ = 13640544.

The previous prime is 40921627. The next prime is 40921651. The reversal of 40921644 is 44612904.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1705057 + ... + 1705080.

Almost surely, 2^40921644 is an apocalyptic number.

It is an amenable number.

40921644 is an abundant number, since it is smaller than the sum of its proper divisors (54562220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40921644 is a wasteful number, since it uses less digits than its factorization.

40921644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410144 (or 3410142 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 40921644 is about 6397.0027356568. The cubic root of 40921644 is about 344.6019184983.

The spelling of 40921644 in words is "forty million, nine hundred twenty-one thousand, six hundred forty-four".