1378231872 has 112 divisors (see below), whose sum is σ = 3772034112. Its totient is φ = 443842560.

The previous prime is 1378231793. The next prime is 1378231889. The reversal of 1378231872 is 2781328731.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799972 + ... + 801692.

It is an arithmetic number, because the mean of its divisors is an integer number (33678876).

Almost surely, 2^1378231872 is an apocalyptic number.

1378231872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378231872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1886017056).

1378231872 is an abundant number, since it is smaller than the sum of its proper divisors (2393802240).

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

1378231872 is a wasteful number, since it uses less digits than its factorization.

1378231872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876 (or 1866 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 1378231872 is about 37124.5454113582. The cubic root of 1378231872 is about 1112.8605901259.

It can be divided in two parts, 13782 and 31872, that added together give a palindrome (45654).

The spelling of 1378231872 in words is "one billion, three hundred seventy-eight million, two hundred thirty-one thousand, eight hundred seventy-two".