40671646 has 4 divisors (see below), whose sum is σ = 61007472. Its totient is φ = 20335822.

The previous prime is 40671643. The next prime is 40671671. The reversal of 40671646 is 64617604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40671643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167910 + ... + 10167913.

It is an arithmetic number, because the mean of its divisors is an integer number (15251868).

Almost surely, 2^40671646 is an apocalyptic number.

40671646 is a deficient number, since it is larger than the sum of its proper divisors (20335826).

40671646 is a wasteful number, since it uses less digits than its factorization.

40671646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20335825.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 40671646 is about 6377.4325555038. The cubic root of 40671646 is about 343.8987386737.

The spelling of 40671646 in words is "forty million, six hundred seventy-one thousand, six hundred forty-six".