1386819660 has 48 divisors (see below), whose sum is σ = 3973406976. Its totient is φ = 361217472.

The previous prime is 1386819653. The next prime is 1386819683. The reversal of 1386819660 is 669186831.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 266184 + ... + 271343.

It is an arithmetic number, because the mean of its divisors is an integer number (82779312).

Almost surely, 2^1386819660 is an apocalyptic number.

1386819660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1386819660 is an abundant number, since it is smaller than the sum of its proper divisors (2586587316).

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

1386819660 is a wasteful number, since it uses less digits than its factorization.

1386819660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537582 (or 537580 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 1386819660 is about 37240.0276584215. The cubic root of 1386819660 is about 1115.1672240761.

The spelling of 1386819660 in words is "one billion, three hundred eighty-six million, eight hundred nineteen thousand, six hundred sixty".