1378750000 has 80 divisors (see below), whose sum is σ = 3342178944. Its totient is φ = 551000000.

The previous prime is 1378749989. The next prime is 1378750013. The reversal of 1378750000 is 578731.

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

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, 1249449 + ... + 1250551.

Almost surely, 2^1378750000 is an apocalyptic number.

1378750000 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 1378750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1671089472).

1378750000 is an abundant number, since it is smaller than the sum of its proper divisors (1963428944).

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

1378750000 is an frugal number, since it uses more digits than its factorization.

1378750000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1378750000 is about 37131.5229959666. The cubic root of 1378750000 is about 1113.0000277157. Note that the first 4 decimals are identical.

The spelling of 1378750000 in words is "one billion, three hundred seventy-eight million, seven hundred fifty thousand".