16440825 has 24 divisors (see below), whose sum is σ = 28123200. Its totient is φ = 8464960.

The previous prime is 16440811. The next prime is 16440829. The reversal of 16440825 is 52804461.

It is not a de Polignac number, because 16440825 - 2⁶ = 16440761 is a prime.

It is a super-3 number, since 3×16440825³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16440792 and 16440801.

It is not an unprimeable number, because it can be changed into a prime (16440829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1605 + ... + 5954.

It is an arithmetic number, because the mean of its divisors is an integer number (1171800).

Almost surely, 2^16440825 is an apocalyptic number.

16440825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16440825 is a deficient number, since it is larger than the sum of its proper divisors (11682375).

16440825 is a wasteful number, since it uses less digits than its factorization.

16440825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7601 (or 7596 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 16440825 is about 4054.7287208887. The cubic root of 16440825 is about 254.2774625195.

The spelling of 16440825 in words is "sixteen million, four hundred forty thousand, eight hundred twenty-five".