1320699744 has 432 divisors, whose sum is σ = 4925243232. Its totient is φ = 332107776.

The previous prime is 1320699707. The next prime is 1320699811. The reversal of 1320699744 is 4479960231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320699744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4219332 + ... + 4219644.

It is an arithmetic number, because the mean of its divisors is an integer number (11401026).

Almost surely, 2^1320699744 is an apocalyptic number.

1320699744 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 1320699744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2462621616).

1320699744 is an abundant number, since it is smaller than the sum of its proper divisors (3604543488).

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

1320699744 is a wasteful number, since it uses less digits than its factorization.

1320699744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1320699744 is about 36341.4328831432. The cubic root of 1320699744 is about 1097.1551126328.

The spelling of 1320699744 in words is "one billion, three hundred twenty million, six hundred ninety-nine thousand, seven hundred forty-four".