16534890 has 48 divisors (see below), whose sum is σ = 44049096. Its totient is φ = 4300800.

The previous prime is 16534879. The next prime is 16534909. The reversal of 16534890 is 9843561.

It can be written as a sum of positive squares in 4 ways, for example, as 11350161 + 5184729 = 3369^2 + 2277^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1450 + ... + 5930.

Almost surely, 2^16534890 is an apocalyptic number.

16534890 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 16534890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22024548).

16534890 is an abundant number, since it is smaller than the sum of its proper divisors (27514206).

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

16534890 is a wasteful number, since it uses less digits than its factorization.

16534890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4535 (or 4532 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 16534890 is about 4066.3115965209. The cubic root of 16534890 is about 254.7614840078.

It can be divided in two parts, 16534 and 890, that added together give a square (17424 = 132²).

The spelling of 16534890 in words is "sixteen million, five hundred thirty-four thousand, eight hundred ninety".