1438341380 has 24 divisors (see below), whose sum is σ = 3452019648. Its totient is φ = 493145568.

The previous prime is 1438341349. The next prime is 1438341397. The reversal of 1438341380 is 831438341.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1438341380.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5136794 + ... + 5137073.

It is an arithmetic number, because the mean of its divisors is an integer number (143834152).

Almost surely, 2^1438341380 is an apocalyptic number.

1438341380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438341380 is an abundant number, since it is smaller than the sum of its proper divisors (2013678268).

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

1438341380 is a wasteful number, since it uses less digits than its factorization.

1438341380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10273883 (or 10273881 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 1438341380 is about 37925.4713879735. The cubic root of 1438341380 is about 1128.8095066507.

The spelling of 1438341380 in words is "one billion, four hundred thirty-eight million, three hundred forty-one thousand, three hundred eighty".