1438748064 has 144 divisors (see below), whose sum is σ = 4426609824. Its totient is φ = 440640000.

The previous prime is 1438748041. The next prime is 1438748081. The reversal of 1438748064 is 4608478341.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 938979 + ... + 940509.

It is an arithmetic number, because the mean of its divisors is an integer number (30740346).

Almost surely, 2^1438748064 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 1438748064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2213304912).

1438748064 is an abundant number, since it is smaller than the sum of its proper divisors (2987861760).

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

1438748064 is a wasteful number, since it uses less digits than its factorization.

1438748064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811 (or 1800 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 1438748064 is about 37930.8326299331. The cubic root of 1438748064 is about 1128.9158850836.

The spelling of 1438748064 in words is "one billion, four hundred thirty-eight million, seven hundred forty-eight thousand, sixty-four".