16005490 has 16 divisors (see below), whose sum is σ = 28962648. Its totient is φ = 6368256.

The previous prime is 16005481. The next prime is 16005499. The reversal of 16005490 is 9450061.

It is an interprime number because it is at equal distance from previous prime (16005481) and next prime (16005499).

It can be written as a sum of positive squares in 4 ways, for example, as 8590761 + 7414729 = 2931^2 + 2723^2 .

It is not an unprimeable number, because it can be changed into a prime (16005499) 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 7 ways as a sum of consecutive naturals, for example, 2217 + ... + 6076.

Almost surely, 2^16005490 is an apocalyptic number.

16005490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16005490 is a deficient number, since it is larger than the sum of its proper divisors (12957158).

16005490 is a wasteful number, since it uses less digits than its factorization.

16005490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8493.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 16005490 is about 4000.6861911427. The cubic root of 16005490 is about 252.0130273773.

The spelling of 16005490 in words is "sixteen million, five thousand, four hundred ninety".