40365556 has 48 divisors (see below), whose sum is σ = 89187840. Its totient is φ = 15527520.

The previous prime is 40365547. The next prime is 40365581. The reversal of 40365556 is 65556304.

It is a super-2 number, since 2×40365556² = 3258756222378272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24775 + ... + 26353.

It is an arithmetic number, because the mean of its divisors is an integer number (1858080).

Almost surely, 2^40365556 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 40365556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44593920).

40365556 is an abundant number, since it is smaller than the sum of its proper divisors (48822284).

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

40365556 is a wasteful number, since it uses less digits than its factorization.

40365556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684 (or 1682 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 40365556 is about 6353.3893316875. The cubic root of 40365556 is about 343.0338516004.

The spelling of 40365556 in words is "forty million, three hundred sixty-five thousand, five hundred fifty-six".