40243635 has 20 divisors (see below), whose sum is σ = 72141168. Its totient is φ = 21463056.

The previous prime is 40243631. The next prime is 40243661. The reversal of 40243635 is 53634204.

40243635 is a `hidden beast` number, since 4 + 0 + 24 + 3 + 635 = 666.

It is not a de Polignac number, because 40243635 - 2² = 40243631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 40243599 and 40243608.

It is not an unprimeable number, because it can be changed into a prime (40243631) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49279 + ... + 50088.

Almost surely, 2^40243635 is an apocalyptic number.

40243635 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40243635 is a deficient number, since it is larger than the sum of its proper divisors (31897533).

40243635 is an equidigital number, since it uses as much as digits as its factorization.

40243635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99384 (or 99375 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 40243635 is about 6343.7871181180. The cubic root of 40243635 is about 342.6881343363.

Adding to 40243635 its reverse (53634204), we get a palindrome (93877839).

The spelling of 40243635 in words is "forty million, two hundred forty-three thousand, six hundred thirty-five".