16305690 has 64 divisors (see below), whose sum is σ = 41057280. Its totient is φ = 4139520.

The previous prime is 16305683. The next prime is 16305697. The reversal of 16305690 is 9650361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16305683) and next prime (16305697).

It is a super-2 number, since 2×16305690² = 531751052752200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (16305697) 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, 82672 + ... + 82868.

It is an arithmetic number, because the mean of its divisors is an integer number (641520).

Almost surely, 2^16305690 is an apocalyptic number.

16305690 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 16305690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20528640).

16305690 is an abundant number, since it is smaller than the sum of its proper divisors (24751590).

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

16305690 is a wasteful number, since it uses less digits than its factorization.

16305690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 16305690 is about 4038.0304605092. The cubic root of 16305690 is about 253.5788689781.

The spelling of 16305690 in words is "sixteen million, three hundred five thousand, six hundred ninety".