16649358 has 96 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 4435200.

The previous prime is 16649357. The next prime is 16649359. The reversal of 16649358 is 85394661.

It is an interprime number because it is at equal distance from previous prime (16649357) and next prime (16649359).

It is a super-2 number, since 2×16649358² = 554402243624328, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16649351) 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 47 ways as a sum of consecutive naturals, for example, 234463 + ... + 234533.

It is an arithmetic number, because the mean of its divisors is an integer number (430920).

Almost surely, 2^16649358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16649358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20684160).

16649358 is an abundant number, since it is smaller than the sum of its proper divisors (24718962).

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

16649358 is a wasteful number, since it uses less digits than its factorization.

16649358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 123 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 16649358 is about 4080.3624838977. The cubic root of 16649358 is about 255.3480215395.

The spelling of 16649358 in words is "sixteen million, six hundred forty-nine thousand, three hundred fifty-eight".