40302643 has 4 divisors (see below), whose sum is σ = 40854808. Its totient is φ = 39750480.

The previous prime is 40302637. The next prime is 40302649. The reversal of 40302643 is 34620304.

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

It is an interprime number because it is at equal distance from previous prime (40302637) and next prime (40302649).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40302643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40302649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275973 + ... + 276118.

It is an arithmetic number, because the mean of its divisors is an integer number (10213702).

Almost surely, 2^40302643 is an apocalyptic number.

40302643 is a deficient number, since it is larger than the sum of its proper divisors (552165).

40302643 is an equidigital number, since it uses as much as digits as its factorization.

40302643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552164.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 40302643 is about 6348.4362641520. The cubic root of 40302643 is about 342.8555435524.

Adding to 40302643 its reverse (34620304), we get a palindrome (74922947).

The spelling of 40302643 in words is "forty million, three hundred two thousand, six hundred forty-three".