13198405 has 16 divisors (see below), whose sum is σ = 17837568. Its totient is φ = 9288000.

The previous prime is 13198379. The next prime is 13198429. The reversal of 13198405 is 50489131.

It is not a de Polignac number, because 13198405 - 2⁵ = 13198373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

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, 2166 + ... + 5575.

It is an arithmetic number, because the mean of its divisors is an integer number (1114848).

Almost surely, 2^13198405 is an apocalyptic number.

It is an amenable number.

13198405 is a deficient number, since it is larger than the sum of its proper divisors (4639163).

13198405 is a wasteful number, since it uses less digits than its factorization.

13198405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7788.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 13198405 is about 3632.9609136350. The cubic root of 13198405 is about 236.3236307360.

The spelling of 13198405 in words is "thirteen million, one hundred ninety-eight thousand, four hundred five".