1398823775 has 12 divisors (see below), whose sum is σ = 1809957072. Its totient is φ = 1070403840.

The previous prime is 1398823717. The next prime is 1398823831. The reversal of 1398823775 is 5773288931.

It is not a de Polignac number, because 1398823775 - 2¹² = 1398819679 is a prime.

It is a Duffinian number.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 1215794 + ... + 1216943.

It is an arithmetic number, because the mean of its divisors is an integer number (150829756).

Almost surely, 2^1398823775 is an apocalyptic number.

1398823775 is a deficient number, since it is larger than the sum of its proper divisors (411133297).

1398823775 is a wasteful number, since it uses less digits than its factorization.

1398823775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432770 (or 2432765 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The square root of 1398823775 is about 37400.8525972337. The cubic root of 1398823775 is about 1118.3755614681.

The spelling of 1398823775 in words is "one billion, three hundred ninety-eight million, eight hundred twenty-three thousand, seven hundred seventy-five".