40971440 has 40 divisors (see below), whose sum is σ = 95538528. Its totient is φ = 16340480.

The previous prime is 40971433. The next prime is 40971481. The reversal of 40971440 is 4417904.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 41189 + ... + 42171.

Almost surely, 2^40971440 is an apocalyptic number.

40971440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40971440 is an abundant number, since it is smaller than the sum of its proper divisors (54567088).

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

40971440 is a wasteful number, since it uses less digits than its factorization.

40971440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1511 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40971440 is about 6400.8936876033. The cubic root of 40971440 is about 344.7416395179.

The spelling of 40971440 in words is "forty million, nine hundred seventy-one thousand, four hundred forty".