16638852 has 24 divisors (see below), whose sum is σ = 41108256. Its totient is φ = 5219968.

The previous prime is 16638833. The next prime is 16638857. The reversal of 16638852 is 25883661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16638852.

It is not an unprimeable number, because it can be changed into a prime (16638857) 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, 40578 + ... + 40985.

It is an arithmetic number, because the mean of its divisors is an integer number (1712844).

Almost surely, 2^16638852 is an apocalyptic number.

16638852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16638852 is an abundant number, since it is smaller than the sum of its proper divisors (24469404).

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

16638852 is a wasteful number, since it uses less digits than its factorization.

16638852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81587 (or 81585 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 16638852 is about 4079.0748951202. The cubic root of 16638852 is about 255.2943007337.

The spelling of 16638852 in words is "sixteen million, six hundred thirty-eight thousand, eight hundred fifty-two".