16398825 has 12 divisors (see below), whose sum is σ = 27112848. Its totient is φ = 8746000.

The previous prime is 16398797. The next prime is 16398841. The reversal of 16398825 is 52889361.

It is not a de Polignac number, because 16398825 - 2¹⁵ = 16366057 is a prime.

It is a super-2 number, since 2×16398825² = 537842922761250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109251 + ... + 109400.

It is an arithmetic number, because the mean of its divisors is an integer number (2259404).

Almost surely, 2^16398825 is an apocalyptic number.

16398825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16398825 is a deficient number, since it is larger than the sum of its proper divisors (10714023).

16398825 is a wasteful number, since it uses less digits than its factorization.

16398825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218664 (or 218659 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 16398825 is about 4049.5462708802. The cubic root of 16398825 is about 254.0607507569.

The spelling of 16398825 in words is "sixteen million, three hundred ninety-eight thousand, eight hundred twenty-five".