1438271200 has 36 divisors (see below), whose sum is σ = 3511181520. Its totient is φ = 575308160.

The previous prime is 1438271173. The next prime is 1438271201. The reversal of 1438271200 is 21728341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438271201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 898120 + ... + 899719.

It is an arithmetic number, because the mean of its divisors is an integer number (97532820).

Almost surely, 2^1438271200 is an apocalyptic number.

1438271200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438271200 is an abundant number, since it is smaller than the sum of its proper divisors (2072910320).

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

1438271200 is a wasteful number, since it uses less digits than its factorization.

1438271200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797859 (or 1797846 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1438271200 is about 37924.5461409890. The cubic root of 1438271200 is about 1128.7911472773.

Adding to 1438271200 its reverse (21728341), we get a palindrome (1459999541).

The spelling of 1438271200 in words is "one billion, four hundred thirty-eight million, two hundred seventy-one thousand, two hundred".