1399299726400 has 63 divisors (see below), whose sum is σ = 3443268322111. Its totient is φ = 559700963840.

The previous prime is 1399299726389. The next prime is 1399299726481. The reversal of 1399299726400 is 46279929931.

The square root of 1399299726400 is 1182920.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 388647509056 + 1010652217344 = 623416^2 + 1005312^2 .

It is a super-2 number, since 2×1399299726400² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47302014 + ... + 47331586.

Almost surely, 2^{1399299726400} is an apocalyptic number.

1399299726400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1399299726400 is the 1182920-th square number.

It is an amenable number.

1399299726400 is an abundant number, since it is smaller than the sum of its proper divisors (2043968595711).

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

1399299726400 is an frugal number, since it uses more digits than its factorization.

1399299726400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59168 (or 29580 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 1399299726400 in words is "one trillion, three hundred ninety-nine billion, two hundred ninety-nine million, seven hundred twenty-six thousand, four hundred".