16623700 has 18 divisors (see below), whose sum is σ = 36073646. Its totient is φ = 6649440.

The previous prime is 16623683. The next prime is 16623709. The reversal of 16623700 is 732661.

It can be written as a sum of positive squares in 3 ways, for example, as 75076 + 16548624 = 274^2 + 4068^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16623709) 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 5 ways as a sum of consecutive naturals, for example, 83019 + ... + 83218.

Almost surely, 2^16623700 is an apocalyptic number.

16623700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16623700 is an abundant number, since it is smaller than the sum of its proper divisors (19449946).

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

16623700 is a wasteful number, since it uses less digits than its factorization.

16623700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166251 (or 166244 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 16623700 is about 4077.2171882302. The cubic root of 16623700 is about 255.2167834862.

The spelling of 16623700 in words is "sixteen million, six hundred twenty-three thousand, seven hundred".