1385346644 has 24 divisors (see below), whose sum is σ = 2645882400. Its totient is φ = 629434080.

The previous prime is 1385346587. The next prime is 1385346671. The reversal of 1385346644 is 4466435831.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1385346595 and 1385346604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127622 + ... + 138050.

It is an arithmetic number, because the mean of its divisors is an integer number (110245100).

Almost surely, 2^1385346644 is an apocalyptic number.

It is an amenable number.

1385346644 is a deficient number, since it is larger than the sum of its proper divisors (1260535756).

1385346644 is a wasteful number, since it uses less digits than its factorization.

1385346644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13463 (or 13461 counting only the distinct ones).

The product of its digits is 829440, while the sum is 44.

The square root of 1385346644 is about 37220.2450824817. The cubic root of 1385346644 is about 1114.7722577754.

The spelling of 1385346644 in words is "one billion, three hundred eighty-five million, three hundred forty-six thousand, six hundred forty-four".