40971640 has 32 divisors (see below), whose sum is σ = 92862000. Its totient is φ = 16268544.

The previous prime is 40971629. The next prime is 40971641. The reversal of 40971640 is 4617904.

40971640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40971641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876 + ... + 9244.

Almost surely, 2^40971640 is an apocalyptic number.

40971640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40971640 is an abundant number, since it is smaller than the sum of its proper divisors (51890360).

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

40971640 is a wasteful number, since it uses less digits than its factorization.

40971640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7519 (or 7515 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 40971640 is about 6400.9093104027. The cubic root of 40971640 is about 344.7422004632.

The spelling of 40971640 in words is "forty million, nine hundred seventy-one thousand, six hundred forty".