40636645 has 8 divisors (see below), whose sum is σ = 55730304. Its totient is φ = 27865104.

The previous prime is 40636601. The next prime is 40636657. The reversal of 40636645 is 54663604.

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

It is a cyclic number.

It is not a de Polignac number, because 40636645 - 2¹⁵ = 40603877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40636645.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 580489 + ... + 580558.

It is an arithmetic number, because the mean of its divisors is an integer number (6966288).

Almost surely, 2^40636645 is an apocalyptic number.

It is an amenable number.

40636645 is a deficient number, since it is larger than the sum of its proper divisors (15093659).

40636645 is a wasteful number, since it uses less digits than its factorization.

40636645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161059.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 40636645 is about 6374.6878354944. The cubic root of 40636645 is about 343.8000601474.

The spelling of 40636645 in words is "forty million, six hundred thirty-six thousand, six hundred forty-five".