1293666444 has 72 divisors (see below), whose sum is σ = 3901549680. Its totient is φ = 369617472.

The previous prime is 1293666443. The next prime is 1293666449. The reversal of 1293666444 is 4446663921.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1293666444.

It is not an unprimeable number, because it can be changed into a prime (1293666443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116937 + ... + 127520.

It is an arithmetic number, because the mean of its divisors is an integer number (54188190).

Almost surely, 2^1293666444 is an apocalyptic number.

1293666444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1293666444 is an abundant number, since it is smaller than the sum of its proper divisors (2607883236).

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

1293666444 is a wasteful number, since it uses less digits than its factorization.

1293666444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244484 (or 244469 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 1293666444 is about 35967.5748973989. The cubic root of 1293666444 is about 1089.6175871426.

The spelling of 1293666444 in words is "one billion, two hundred ninety-three million, six hundred sixty-six thousand, four hundred forty-four".