1438068720 has 80 divisors (see below), whose sum is σ = 4863295872. Its totient is φ = 348622080.

The previous prime is 1438068701. The next prime is 1438068781. The reversal of 1438068720 is 278608341.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269722 + ... + 275001.

Almost surely, 2^1438068720 is an apocalyptic number.

1438068720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438068720 is an abundant number, since it is smaller than the sum of its proper divisors (3425227152).

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

1438068720 is a wasteful number, since it uses less digits than its factorization.

1438068720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544750 (or 544744 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1438068720 is about 37921.8765358467. The cubic root of 1438068720 is about 1128.7381743382.

The spelling of 1438068720 in words is "one billion, four hundred thirty-eight million, sixty-eight thousand, seven hundred twenty".