1378382820 has 48 divisors (see below), whose sum is σ = 3877798848. Its totient is φ = 365823360.

The previous prime is 1378382777. The next prime is 1378382821. The reversal of 1378382820 is 282838731.

It is not an unprimeable number, because it can be changed into a prime (1378382821) 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, 41779 + ... + 67098.

It is an arithmetic number, because the mean of its divisors is an integer number (80787476).

Almost surely, 2^1378382820 is an apocalyptic number.

1378382820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378382820 is an abundant number, since it is smaller than the sum of its proper divisors (2499416028).

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

1378382820 is a wasteful number, since it uses less digits than its factorization.

1378382820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109100 (or 109098 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1378382820 is about 37126.5783502870. The cubic root of 1378382820 is about 1112.9012165622.

The spelling of 1378382820 in words is "one billion, three hundred seventy-eight million, three hundred eighty-two thousand, eight hundred twenty".