40217746 has 4 divisors (see below), whose sum is σ = 60326622. Its totient is φ = 20108872.

The previous prime is 40217743. The next prime is 40217783. The reversal of 40217746 is 64771204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35105625 + 5112121 = 5925^2 + 2261^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (40217741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054435 + ... + 10054438.

Almost surely, 2^40217746 is an apocalyptic number.

40217746 is a deficient number, since it is larger than the sum of its proper divisors (20108876).

40217746 is a wasteful number, since it uses less digits than its factorization.

40217746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20108875.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 40217746 is about 6341.7462894695. The cubic root of 40217746 is about 342.6146340488.

The spelling of 40217746 in words is "forty million, two hundred seventeen thousand, seven hundred forty-six".