8438081854 has 4 divisors (see below), whose sum is σ = 12657122784. Its totient is φ = 4219040926.

The previous prime is 8438081819. The next prime is 8438081857. The reversal of 8438081854 is 4581808348.

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

It is a junction number, because it is equal to n+sod(n) for n = 8438081798 and 8438081807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8438081857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109520462 + ... + 2109520465.

It is an arithmetic number, because the mean of its divisors is an integer number (3164280696).

Almost surely, 2^8438081854 is an apocalyptic number.

8438081854 is a deficient number, since it is larger than the sum of its proper divisors (4219040930).

8438081854 is a wasteful number, since it uses less digits than its factorization.

8438081854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4219040929.

The product of its (nonzero) digits is 983040, while the sum is 49.

The square root of 8438081854 is about 91859.0325117786. The cubic root of 8438081854 is about 2035.8600082519.

The spelling of 8438081854 in words is "eight billion, four hundred thirty-eight million, eighty-one thousand, eight hundred fifty-four".