40636844 has 12 divisors (see below), whose sum is σ = 71434944. Its totient is φ = 20226864.

The previous prime is 40636793. The next prime is 40636861. The reversal of 40636844 is 44863604.

40636844 = 311² + 312² + ... + 533².

It is a happy number.

It is a super-3 number, since 3×40636844³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21887 + ... + 23670.

It is an arithmetic number, because the mean of its divisors is an integer number (5952912).

Almost surely, 2^40636844 is an apocalyptic number.

It is an amenable number.

40636844 is a deficient number, since it is larger than the sum of its proper divisors (30798100).

40636844 is a wasteful number, since it uses less digits than its factorization.

40636844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45784 (or 45782 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 40636844 is about 6374.7034440827. The cubic root of 40636844 is about 343.8006213494.

The spelling of 40636844 in words is "forty million, six hundred thirty-six thousand, eight hundred forty-four".