16428825 has 120 divisors (see below), whose sum is σ = 37209920. Its totient is φ = 6998400.

The previous prime is 16428779. The next prime is 16428829. The reversal of 16428825 is 52882461.

16428825 is a `hidden beast` number, since 1 + 642 + 8 + 8 + 2 + 5 = 666.

It is not a de Polignac number, because 16428825 - 2¹⁴ = 16412441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16428825.

It is not an unprimeable number, because it can be changed into a prime (16428829) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 269295 + ... + 269355.

Almost surely, 2^16428825 is an apocalyptic number.

16428825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16428825 is an abundant number, since it is smaller than the sum of its proper divisors (20781095).

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

16428825 is a wasteful number, since it uses less digits than its factorization.

16428825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 95 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 16428825 is about 4053.2486970330. The cubic root of 16428825 is about 254.2155825707.

The spelling of 16428825 in words is "sixteen million, four hundred twenty-eight thousand, eight hundred twenty-five".