16621044 has 36 divisors (see below), whose sum is σ = 42632352. Its totient is φ = 5036240.

The previous prime is 16621043. The next prime is 16621061. The reversal of 16621044 is 44012661.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16621043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4272 + ... + 7175.

It is an arithmetic number, because the mean of its divisors is an integer number (1184232).

Almost surely, 2^16621044 is an apocalyptic number.

It is an amenable number.

16621044 is an abundant number, since it is smaller than the sum of its proper divisors (26011308).

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

16621044 is a wasteful number, since it uses less digits than its factorization.

16621044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11476 (or 11463 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 16621044 is about 4076.8914628673. The cubic root of 16621044 is about 255.2031906062.

The spelling of 16621044 in words is "sixteen million, six hundred twenty-one thousand, forty-four".