1394444646 has 120 divisors (see below), whose sum is σ = 3674225016. Its totient is φ = 394087680.

The previous prime is 1394444629. The next prime is 1394444647. The reversal of 1394444646 is 6464444931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1394444647) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 769081 + ... + 770891.

Almost surely, 2^1394444646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1394444646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837112508).

1394444646 is an abundant number, since it is smaller than the sum of its proper divisors (2279780370).

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

1394444646 is a wasteful number, since it uses less digits than its factorization.

1394444646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936 (or 1920 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 1394444646 is about 37342.2635361061. The cubic root of 1394444646 is about 1117.2072869670.

It can be divided in two parts, 1394 and 444646, that added together give a triangular number (446040 = T₉₄₄).

The spelling of 1394444646 in words is "one billion, three hundred ninety-four million, four hundred forty-four thousand, six hundred forty-six".