1386443446 has 4 divisors (see below), whose sum is σ = 2079665172. Its totient is φ = 693221722.

The previous prime is 1386443431. The next prime is 1386443489. The reversal of 1386443446 is 6443446831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6443446831 = 89 ⋅72398279.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346610860 + ... + 346610863.

It is an arithmetic number, because the mean of its divisors is an integer number (519916293).

Almost surely, 2^1386443446 is an apocalyptic number.

1386443446 is a deficient number, since it is larger than the sum of its proper divisors (693221726).

1386443446 is an equidigital number, since it uses as much as digits as its factorization.

1386443446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693221725.

The product of its digits is 663552, while the sum is 43.

The square root of 1386443446 is about 37234.9761111780. The cubic root of 1386443446 is about 1115.0663747546.

The spelling of 1386443446 in words is "one billion, three hundred eighty-six million, four hundred forty-three thousand, four hundred forty-six".