40736643 has 8 divisors (see below), whose sum is σ = 54367248. Its totient is φ = 27131904.

The previous prime is 40736623. The next prime is 40736659. The reversal of 40736643 is 34663704.

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

It is not a de Polignac number, because 40736643 - 2¹⁰ = 40735619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40736623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2430 + ... + 9347.

It is an arithmetic number, because the mean of its divisors is an integer number (6795906).

Almost surely, 2^40736643 is an apocalyptic number.

40736643 is a deficient number, since it is larger than the sum of its proper divisors (13630605).

40736643 is a wasteful number, since it uses less digits than its factorization.

40736643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12933.

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 40736643 is about 6382.5263806740. The cubic root of 40736643 is about 344.0818350239.

The spelling of 40736643 in words is "forty million, seven hundred thirty-six thousand, six hundred forty-three".