1399486365 has 12 divisors (see below), whose sum is σ = 2425776444. Its totient is φ = 746392704.

The previous prime is 1399486357. The next prime is 1399486367. The reversal of 1399486365 is 5636849931.

1399486365 is a `hidden beast` number, since 13 + 99 + 486 + 3 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1101509721 + 297976644 = 33189^2 + 17262^2 .

It is not a de Polignac number, because 1399486365 - 2³ = 1399486357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399486367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15549804 + ... + 15549893.

It is an arithmetic number, because the mean of its divisors is an integer number (202148037).

Almost surely, 2^1399486365 is an apocalyptic number.

1399486365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1399486365 is a deficient number, since it is larger than the sum of its proper divisors (1026290079).

1399486365 is a wasteful number, since it uses less digits than its factorization.

1399486365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31099708 (or 31099705 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 1399486365 is about 37409.7095016788. The cubic root of 1399486365 is about 1118.5521163483.

The spelling of 1399486365 in words is "one billion, three hundred ninety-nine million, four hundred eighty-six thousand, three hundred sixty-five".