63440438 has 4 divisors (see below), whose sum is σ = 95160660. Its totient is φ = 31720218.

The previous prime is 63440401. The next prime is 63440471. The reversal of 63440438 is 83404436.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15860108 + ... + 15860111.

It is an arithmetic number, because the mean of its divisors is an integer number (23790165).

Almost surely, 2^63440438 is an apocalyptic number.

63440438 is a deficient number, since it is larger than the sum of its proper divisors (31720222).

63440438 is a wasteful number, since it uses less digits than its factorization.

63440438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31720221.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 63440438 is about 7964.9505962059. The cubic root of 63440438 is about 398.8308317771.

The spelling of 63440438 in words is "sixty-three million, four hundred forty thousand, four hundred thirty-eight".