1438707816 has 432 divisors, whose sum is σ = 5207155200. Its totient is φ = 356638464.

The previous prime is 1438707779. The next prime is 1438707827. The reversal of 1438707816 is 6187078341.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 11328345 + ... + 11328471.

It is an arithmetic number, because the mean of its divisors is an integer number (12053600).

Almost surely, 2^1438707816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438707816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2603577600).

1438707816 is an abundant number, since it is smaller than the sum of its proper divisors (3768447384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1438707816 is a wasteful number, since it uses less digits than its factorization.

1438707816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 1438707816 is about 37930.3020815812. The cubic root of 1438707816 is about 1128.9053581004.

The spelling of 1438707816 in words is "one billion, four hundred thirty-eight million, seven hundred seven thousand, eight hundred sixteen".