1378871900 has 72 divisors (see below), whose sum is σ = 3492443136. Its totient is φ = 462686400.

The previous prime is 1378871891. The next prime is 1378871911. The reversal of 1378871900 is 91788731.

It is a super-2 number, since 2×1378871900² = 3802575433219220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11945 + ... + 53855.

Almost surely, 2^1378871900 is an apocalyptic number.

1378871900 is a gapful number since it is divisible by the number (10) 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 1378871900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1746221568).

1378871900 is an abundant number, since it is smaller than the sum of its proper divisors (2113571236).

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

1378871900 is a wasteful number, since it uses less digits than its factorization.

1378871900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41979 (or 41972 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 1378871900 is about 37133.1644221173. The cubic root of 1378871900 is about 1113.0328281279.

The spelling of 1378871900 in words is "one billion, three hundred seventy-eight million, eight hundred seventy-one thousand, nine hundred".