1379567820 has 48 divisors (see below), whose sum is σ = 3865004640. Its totient is φ = 367673856.

The previous prime is 1379567809. The next prime is 1379567837. The reversal of 1379567820 is 287659731.

It is a self number, because there is not a number n which added to its sum of digits gives 1379567820.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118584 + ... + 129696.

It is an arithmetic number, because the mean of its divisors is an integer number (80520930).

Almost surely, 2^1379567820 is an apocalyptic number.

1379567820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1379567820 is an abundant number, since it is smaller than the sum of its proper divisors (2485436820).

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

1379567820 is a wasteful number, since it uses less digits than its factorization.

1379567820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13194 (or 13192 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 48.

The square root of 1379567820 is about 37142.5338392523. The cubic root of 1379567820 is about 1113.2200467596.

The spelling of 1379567820 in words is "one billion, three hundred seventy-nine million, five hundred sixty-seven thousand, eight hundred twenty".