40396646 has 8 divisors (see below), whose sum is σ = 60758544. Its totient is φ = 20143800.

The previous prime is 40396639. The next prime is 40396649. The reversal of 40396646 is 64669304.

It is a happy number.

40396646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40396649) 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 3 ways as a sum of consecutive naturals, for example, 26330 + ... + 27821.

It is an arithmetic number, because the mean of its divisors is an integer number (7594818).

Almost surely, 2^40396646 is an apocalyptic number.

40396646 is a deficient number, since it is larger than the sum of its proper divisors (20361898).

40396646 is a wasteful number, since it uses less digits than its factorization.

40396646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54526.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 40396646 is about 6355.8355862939. The cubic root of 40396646 is about 343.1218984948.

The spelling of 40396646 in words is "forty million, three hundred ninety-six thousand, six hundred forty-six".