63840235 has 4 divisors (see below), whose sum is σ = 76608288. Its totient is φ = 51072184.

The previous prime is 63840229. The next prime is 63840299. The reversal of 63840235 is 53204836.

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

It is a cyclic number.

It is not a de Polignac number, because 63840235 - 2⁹ = 63839723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63840197 and 63840206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6384019 + ... + 6384028.

It is an arithmetic number, because the mean of its divisors is an integer number (19152072).

Almost surely, 2^63840235 is an apocalyptic number.

63840235 is a deficient number, since it is larger than the sum of its proper divisors (12768053).

63840235 is a wasteful number, since it uses less digits than its factorization.

63840235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12768052.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 63840235 is about 7990.0084480556. The cubic root of 63840235 is about 399.6668789028. Note that the first 3 decimals are identical.

The spelling of 63840235 in words is "sixty-three million, eight hundred forty thousand, two hundred thirty-five".