40393856 has 64 divisors (see below), whose sum is σ = 84823200. Its totient is φ = 19138560.

The previous prime is 40393841. The next prime is 40393877. The reversal of 40393856 is 65839304.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225575 + ... + 225753.

Almost surely, 2^40393856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40393856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42411600).

40393856 is an abundant number, since it is smaller than the sum of its proper divisors (44429344).

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

40393856 is a wasteful number, since it uses less digits than its factorization.

40393856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 40393856 is about 6355.6160991677. The cubic root of 40393856 is about 343.1139990589.

The spelling of 40393856 in words is "forty million, three hundred ninety-three thousand, eight hundred fifty-six".