16512890 has 16 divisors (see below), whose sum is σ = 30748680. Its totient is φ = 6377280.

The previous prime is 16512889. The next prime is 16512893. The reversal of 16512890 is 9821561.

It can be written as a sum of positive squares in 4 ways, for example, as 13446889 + 3066001 = 3667^2 + 1751^2 .

It is not an unprimeable number, because it can be changed into a prime (16512893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28181 + ... + 28760.

Almost surely, 2^16512890 is an apocalyptic number.

16512890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16512890 is a deficient number, since it is larger than the sum of its proper divisors (14235790).

16512890 is a wasteful number, since it uses less digits than its factorization.

16512890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56977.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 16512890 is about 4063.6055418803. The cubic root of 16512890 is about 254.6484454525.

The spelling of 16512890 in words is "sixteen million, five hundred twelve thousand, eight hundred ninety".