40456643 has 8 divisors (see below), whose sum is σ = 43960320. Its totient is φ = 37090440.

The previous prime is 40456639. The next prime is 40456657. The reversal of 40456643 is 34665404.

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 40456643 - 2² = 40456639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40456693) 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, 33755 + ... + 34932.

It is an arithmetic number, because the mean of its divisors is an integer number (5495040).

Almost surely, 2^40456643 is an apocalyptic number.

40456643 is a deficient number, since it is larger than the sum of its proper divisors (3503677).

40456643 is a wasteful number, since it uses less digits than its factorization.

40456643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68737.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 40456643 is about 6360.5536708686. The cubic root of 40456643 is about 343.2916824035.

The spelling of 40456643 in words is "forty million, four hundred fifty-six thousand, six hundred forty-three".