16616490 has 64 divisors (see below), whose sum is σ = 44554752. Its totient is φ = 3931200.

The previous prime is 16616489. The next prime is 16616491. The reversal of 16616490 is 9461661.

It is an interprime number because it is at equal distance from previous prime (16616489) and next prime (16616491).

It is a super-2 number, since 2×16616490² = 552215479840200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16616491) 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 31 ways as a sum of consecutive naturals, for example, 13605 + ... + 14775.

It is an arithmetic number, because the mean of its divisors is an integer number (696168).

Almost surely, 2^16616490 is an apocalyptic number.

16616490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16616490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22277376).

16616490 is an abundant number, since it is smaller than the sum of its proper divisors (27938262).

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

16616490 is a wasteful number, since it uses less digits than its factorization.

16616490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 16616490 is about 4076.3329108403. The cubic root of 16616490 is about 255.1798807690.

The spelling of 16616490 in words is "sixteen million, six hundred sixteen thousand, four hundred ninety".