1398399205 has 16 divisors (see below), whose sum is σ = 1918454400. Its totient is φ = 958577472.

The previous prime is 1398399199. The next prime is 1398399217. The reversal of 1398399205 is 5029938931.

It is a cyclic number.

It is not a de Polignac number, because 1398399205 - 2⁷ = 1398399077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147622 + ... + 156808.

It is an arithmetic number, because the mean of its divisors is an integer number (119903400).

Almost surely, 2^1398399205 is an apocalyptic number.

It is an amenable number.

1398399205 is a deficient number, since it is larger than the sum of its proper divisors (520055195).

1398399205 is an equidigital number, since it uses as much as digits as its factorization.

1398399205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13548.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 1398399205 is about 37395.1762263530. The cubic root of 1398399205 is about 1118.2624004994.

The spelling of 1398399205 in words is "one billion, three hundred ninety-eight million, three hundred ninety-nine thousand, two hundred five".