1399768055 has 24 divisors (see below), whose sum is σ = 1956623040. Its totient is φ = 958534080.

The previous prime is 1399768021. The next prime is 1399768067. The reversal of 1399768055 is 5508679931.

It is not a de Polignac number, because 1399768055 - 2²⁰ = 1398719479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1399767988 and 1399768006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197666 + ... + 204624.

It is an arithmetic number, because the mean of its divisors is an integer number (81525960).

Almost surely, 2^1399768055 is an apocalyptic number.

1399768055 is a deficient number, since it is larger than the sum of its proper divisors (556854985).

1399768055 is an equidigital number, since it uses as much as digits as its factorization.

1399768055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7799 (or 7792 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 53.

The square root of 1399768055 is about 37413.4742439138. The cubic root of 1399768055 is about 1118.6271590725.

The spelling of 1399768055 in words is "one billion, three hundred ninety-nine million, seven hundred sixty-eight thousand, fifty-five".