16409925 has 96 divisors (see below), whose sum is σ = 36188160. Its totient is φ = 7128000.

The previous prime is 16409893. The next prime is 16409929. The reversal of 16409925 is 52990461.

16409925 is a `hidden beast` number, since 1 + 640 + 9 + 9 + 2 + 5 = 666.

It is not a de Polignac number, because 16409925 - 2⁵ = 16409893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16409925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16409929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 108600 + ... + 108750.

It is an arithmetic number, because the mean of its divisors is an integer number (376960).

Almost surely, 2^16409925 is an apocalyptic number.

16409925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16409925 is an abundant number, since it is smaller than the sum of its proper divisors (19778235).

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

16409925 is a wasteful number, since it uses less digits than its factorization.

16409925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 16409925 is about 4050.9165629521. The cubic root of 16409925 is about 254.1180605193.

The spelling of 16409925 in words is "sixteen million, four hundred nine thousand, nine hundred twenty-five".