40581366 has 32 divisors (see below), whose sum is σ = 93000960. Its totient is φ = 11564256.

The previous prime is 40581337. The next prime is 40581403. The reversal of 40581366 is 66318504.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18580 + ... + 20648.

It is an arithmetic number, because the mean of its divisors is an integer number (2906280).

Almost surely, 2^40581366 is an apocalyptic number.

40581366 is an abundant number, since it is smaller than the sum of its proper divisors (52419594).

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

40581366 is a wasteful number, since it uses less digits than its factorization.

40581366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 40581366 is about 6370.3505398055. The cubic root of 40581366 is about 343.6440962577.

The spelling of 40581366 in words is "forty million, five hundred eighty-one thousand, three hundred sixty-six".