16505272 has 32 divisors (see below), whose sum is σ = 36126720. Its totient is φ = 6922080.

The previous prime is 16505267. The next prime is 16505273. The reversal of 16505272 is 27250561.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 16505272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505273) 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, 504 + ... + 5767.

It is an arithmetic number, because the mean of its divisors is an integer number (1128960).

Almost surely, 2^16505272 is an apocalyptic number.

It is an amenable number.

16505272 is an abundant number, since it is smaller than the sum of its proper divisors (19621448).

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

16505272 is a wasteful number, since it uses less digits than its factorization.

16505272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331 (or 6327 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 16505272 is about 4062.6680888303. The cubic root of 16505272 is about 254.6092798824.

The spelling of 16505272 in words is "sixteen million, five hundred five thousand, two hundred seventy-two".