1379385920 has 112 divisors (see below), whose sum is σ = 3699150336. Its totient is φ = 485376000.

The previous prime is 1379385907. The next prime is 1379385929. The reversal of 1379385920 is 295839731.

It is not an unprimeable number, because it can be changed into a prime (1379385929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102800 + ... + 115440.

It is an arithmetic number, because the mean of its divisors is an integer number (33028128).

Almost surely, 2^1379385920 is an apocalyptic number.

1379385920 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 1379385920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849575168).

1379385920 is an abundant number, since it is smaller than the sum of its proper divisors (2319764416).

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

1379385920 is a wasteful number, since it uses less digits than its factorization.

1379385920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12700 (or 12690 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 1379385920 is about 37140.0850833705. The cubic root of 1379385920 is about 1113.1711175167.

The spelling of 1379385920 in words is "one billion, three hundred seventy-nine million, three hundred eighty-five thousand, nine hundred twenty".