1398436671 has 8 divisors (see below), whose sum is σ = 1867849984. Its totient is φ = 930657240.

The previous prime is 1398436657. The next prime is 1398436687. The reversal of 1398436671 is 1766348931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1398436671 - 2²¹ = 1396339519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398436671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398436601) 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 7 ways as a sum of consecutive naturals, for example, 406471 + ... + 409896.

It is an arithmetic number, because the mean of its divisors is an integer number (233481248).

Almost surely, 2^1398436671 is an apocalyptic number.

1398436671 is a deficient number, since it is larger than the sum of its proper divisors (469413313).

1398436671 is an equidigital number, since it uses as much as digits as its factorization.

1398436671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816941.

The product of its digits is 653184, while the sum is 48.

The square root of 1398436671 is about 37395.6771699618. The cubic root of 1398436671 is about 1118.2723872626.

The spelling of 1398436671 in words is "one billion, three hundred ninety-eight million, four hundred thirty-six thousand, six hundred seventy-one".