1386646320 has 80 divisors (see below), whose sum is σ = 4371505920. Its totient is φ = 363501312.

The previous prime is 1386646319. The next prime is 1386646321. The reversal of 1386646320 is 236466831.

It is an interprime number because it is at equal distance from previous prime (1386646319) and next prime (1386646321).

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

It is not an unprimeable number, because it can be changed into a prime (1386646321) by changing a digit.

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, 34804 + ... + 63123.

It is an arithmetic number, because the mean of its divisors is an integer number (54643824).

Almost surely, 2^1386646320 is an apocalyptic number.

1386646320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1386646320 is an abundant number, since it is smaller than the sum of its proper divisors (2984859600).

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

1386646320 is a wasteful number, since it uses less digits than its factorization.

1386646320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98002 (or 97996 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 1386646320 is about 37237.7002512239. The cubic root of 1386646320 is about 1115.1207601783.

The spelling of 1386646320 in words is "one billion, three hundred eighty-six million, six hundred forty-six thousand, three hundred twenty".