1293688704 has 128 divisors (see below), whose sum is σ = 4284391680. Its totient is φ = 336015360.

The previous prime is 1293688687. The next prime is 1293688787. The reversal of 1293688704 is 4078863921.

It is a tau number, because it is divible by the number of its divisors (128).

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 a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7692 + ... + 51444.

It is an arithmetic number, because the mean of its divisors is an integer number (33471810).

Almost surely, 2^1293688704 is an apocalyptic number.

1293688704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1293688704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2142195840).

1293688704 is an abundant number, since it is smaller than the sum of its proper divisors (2990702976).

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

1293688704 is a wasteful number, since it uses less digits than its factorization.

1293688704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43788 (or 43776 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1293688704 is about 35967.8843414511. The cubic root of 1293688704 is about 1089.6238367568.

The spelling of 1293688704 in words is "one billion, two hundred ninety-three million, six hundred eighty-eight thousand, seven hundred four".