13633998 has 16 divisors (see below), whose sum is σ = 31163520. Its totient is φ = 3895416.

The previous prime is 13633993. The next prime is 13634011. The reversal of 13633998 is 89933631.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 324619 = 13633998 / (1 + 3 + 6 + 3 + 3 + 9 + 9 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13633993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162268 + ... + 162351.

It is an arithmetic number, because the mean of its divisors is an integer number (1947720).

Almost surely, 2^13633998 is an apocalyptic number.

13633998 is an abundant number, since it is smaller than the sum of its proper divisors (17529522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13633998 is a wasteful number, since it uses less digits than its factorization.

13633998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324631.

The product of its digits is 104976, while the sum is 42.

The square root of 13633998 is about 3692.4244068092. The cubic root of 13633998 is about 238.8953750377.

The spelling of 13633998 in words is "thirteen million, six hundred thirty-three thousand, nine hundred ninety-eight".