1398545643 has 16 divisors (see below), whose sum is σ = 2039241600. Its totient is φ = 845522880.

The previous prime is 1398545641. The next prime is 1398545653. The reversal of 1398545643 is 3465458931.

It is not a de Polignac number, because 1398545643 - 2¹ = 1398545641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1398545592 and 1398545601.

It is not an unprimeable number, because it can be changed into a prime (1398545641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 38313 + ... + 65306.

It is an arithmetic number, because the mean of its divisors is an integer number (127452600).

Almost surely, 2^1398545643 is an apocalyptic number.

1398545643 is a deficient number, since it is larger than the sum of its proper divisors (640695957).

1398545643 is a wasteful number, since it uses less digits than its factorization.

1398545643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104042.

The product of its digits is 1555200, while the sum is 48.

The square root of 1398545643 is about 37397.1341549055. The cubic root of 1398545643 is about 1118.3014333195.

The spelling of 1398545643 in words is "one billion, three hundred ninety-eight million, five hundred forty-five thousand, six hundred forty-three".